# nivbha85

Jay@ManhattanReview posted a reply to Last Thursday, John assembled chairs at a rate of 3 chairs in the Data Sufficiency forum
“I already posted the answer here. https://www.beatthegmat.com/last-thursday-john-assembled-chairs-at-a-rate-of-3-chairs-t307526.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses San Diego | ACT Prep Courses San Antonio | ...”
Today
Jay@ManhattanReview posted a reply to Of the 60 families in a certain neighborhood, 38 have a cat. in the Data Sufficiency forum
“Already answered https://www.beatthegmat.com/of-the-60-families-in-a-certain-neighborhood-t184466.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses San Diego | ACT Prep Courses San Antonio | Houston IELTS Tutoring | and ...”
Today
Jay@ManhattanReview posted a reply to What was the average production rate of cups of espresso per in the Data Sufficiency forum
“Even together both the statements are insufficient as we do not have any information about machine C. Information about machine E is of no use. The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses San Diego | ...”
Today
Jay@ManhattanReview posted a reply to Maria wants to send a package overseas. She can either pay in the Data Sufficiency forum
“Pl. find it here: https://www.beatthegmat.com/maria-wants-to-send-a-package-overseas-she-can-either-pay-t304731.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses San Diego | ACT Prep Courses San Antonio | Houston IELTS ...”
Today
Jay@ManhattanReview posted a reply to Of the 75 houses in a certain community, 48 have a patio. in the Data Sufficiency forum
“Given: Total number of houses = 75; Say, # of houses that have ONLY swimming pool = s; # of houses that have ONLY patio = p; # of houses that have both swimming pool and patio= b; Thus, we have p + b = 48 (given) # of houses that have neither swimming pool nor patio= n => 75 = s ...”
Today
Jay@ManhattanReview posted a reply to If n is a positive integer, is n^3 + 4n^2 - 5n divisible by in the Data Sufficiency forum
“We have n^3 + 4n^2 – 5n => n(n^2 + 4n – 5) = n(n^2 + 5n – n – 5) = nD Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses San Diego | ACT Prep Courses San Antonio | Houston IELTS Tutoring | and many more... ...”
Today
Jay@ManhattanReview posted a reply to If 2s > 8 and 3t < 9, which of the following could be in the Problem Solving forum
“Given 2s > 8 and 3t < 9, we find that s > 4 and t < 3. So, s – t would be greater than 1. Thus, none of the values –1, 0, and 1 can be correct for it. The correct answer: A Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | ...”
Today
Jay@ManhattanReview posted a reply to Oil, vinegar, and water are mixed in a 3 to 2 to 1 ratio to in the Problem Solving forum
“Given that there is no constraint with the usage of water, we must focus on oil and vinegar. The ratio of oil and vinegar is 3 : 2. Let''s interpret above. Taking the ratio of oil and vinegar is 3 : 2 as 1 : 2/3 • For 1 cup of oil, we need 2/3 cups of vinegar => For 8 cup of oil, ...”
July 17, 2019
Jay@ManhattanReview posted a reply to Physicians often estimate the adult height $$c$$, in inches, in the Data Sufficiency forum
“Given $$\frac{m+f-13.2}{2}\leq c \leq \frac{m+f-2.8}{2}$$, we find that the estimated adult height of a female child is a function of mother''s and father''s heights and is not a function of female child''s current height; thus, Statement 1 is of no use. We see that Statement 2 provides the required ...”
July 16, 2019
Jay@ManhattanReview posted a reply to Of the total number of copies of Magazine $$X$$ sold last in the Data Sufficiency forum
“Say the total no. of copies sold = x; Thus, the total no. of copies sold at full price = 40% of x = 0.4x Let''s take each statement one by one. 1. Last week, the full price for a copy of Magazine $$X$$ was $1.50 and the total revenue from full-price sales was$112,500. Total no. of ...”
July 16, 2019
Jay@ManhattanReview posted a reply to On the number line above, p, q, r, s, and t are five in the Data Sufficiency forum
“Since p, q, r, s, and t are five consecutive even integers in increasing order, we can write them as q = p + 2; r = p + 4; s = p + 6; t = p + 8. Average of p, q, r, s, and t = middle-most among them; since these integers are evenly spaced, median and mean would be the same. Average of p, q, ...”
July 16, 2019
Jay@ManhattanReview posted a reply to A marketer bought $$N$$ crates of empty cardboard gift boxes in the Problem Solving forum
“Total no. of individual gift boxes = NQ; Amount paid to buy $$N$$ crates of empty cardboard gift boxes = $W; Total no. of collections = NQ/J; Total sales =$(NQ/J)*P; Profit = (NQ/J)*P – W = Z => P = J(Z + W)/NQ The correct answer: B Hope this helps! -Jay ...”
July 16, 2019
Jay@ManhattanReview posted a reply to If a brokerage firm charged a commission of 2% of the total in the Data Sufficiency forum
“Say the total dollar amount of the trade was $x; thus, the total amount paid = x + 2% of x =$1.02x We have to get the value of x. Let''s take each statement one by one. 1. The dollar amount of the trade minus the brokerage firm''s commission was $88000. => 88,000 = (100 – 2)% of ...” July 12, 2019 Jay@ManhattanReview posted a reply to When running a mile during a recent track meet, Nuria was in the Problem Solving forum “So, the time 5 minutes, 44 seconds did not take into account 11/25 of a minute; we must add it to 5 minutes, 44 seconds. 11/25 of a minute = (11/250*60 =26.4 minutes So, the correct time = 5 minutes, 44 seconds + 26.4 minutes = 5 minutes, 77.4 seconds = 6 minutes, 10.4 seconds The ...” July 12, 2019 Jay@ManhattanReview posted a reply to In how many different ways can 3 identical green shirts and in the Problem Solving forum “If there are p numbers of identical items, q numbers of identical items, and r numbers of identical items, the total number of way, (p + q + r) items be distributed is given by (p + q + r)! / (p!*q!*r!). Thus, the number of ways 3 identical green shirts and 3 identical red shirts be distributed ...” July 12, 2019 Jay@ManhattanReview posted a reply to What is the remainder when a is divided by 4? in the Data Sufficiency forum “Let''s take each statement one by one. (1) a is the square of an odd integer. The squares of first odd numbers are 1^2 = 1; 3^2 = 9; 5^2 = 25; 7^2 = 49 The numbers are 1, 9, 25, 49, 81 and so on. Each number divided by 4 leaves a remainder 1. Sufficient. (2) a is a multiple of 3. ...” July 11, 2019 Jay@ManhattanReview posted a reply to Set A = {a, b, c} and has a median of b. Is the average of a in the Data Sufficiency forum “Given: Median of the Set A = {a, b, c} is b. We have to determine whether the average of a and c greater than b. Let''s take each statement one by one. (1) The average of Set A is b. => (a + b + c)/3 = b => (a + c)/2 = b => the average of a and c is equal to b, not greater ...” July 11, 2019 Jay@ManhattanReview posted a reply to In 2015, Ashley invited 12% more people to her annual in the Problem Solving forum “Say the number of people Ashley invited in 2014 was 100. Thus, she invited 100 + 12% of 100 = 112 people in 2015. Thus, she invited 112 + 10% of 112 = appx 123 people in 2016. And finally, she invited 123 + 10% of 123 = appx 135 people in 2017. Thus, the number of people she invites in 2017 is ...” July 11, 2019 Jay@ManhattanReview posted a reply to Does the rectangular mirror have an area greater than $$10$$ in the Data Sufficiency forum “Say the length and the breadth of the rectangular mirror are a and b, respectively. Thus, we have to determine whether ab > 10. Let''s take each statement one by one. 1. The perimeter of the mirror is $$24\,cm$$. => 2(a + b) = 24 => a + b = 12 Can''t determine if ab > 10. ...” July 8, 2019 Jay@ManhattanReview posted a reply to If x and y are positive numbers, is $$x<y$$? in the Data Sufficiency forum “Given: x and y are positive numbers We have to determine whether $$x<y$$. Let''s take each statement one by one. 1. $$\frac{(x+1)}{(y+1)}>\frac{x}{y}$$ We have (x + 1) / (y + 1) > x / y (x + 1) / (y + 1) – x / y > 0 => (y – x) / y(y + 1) > 0 => (y – ...” July 8, 2019 Jay@ManhattanReview posted a reply to The table above shows the number of students in a certain in the Data Sufficiency forum “Pl. see the following table, which is self-explanatory. https://i.postimg.cc/6yPhd5tR/Biology.png The correct answer: B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses Princeton | ACT Prep Courses Dallas | New York ...” July 8, 2019 Jay@ManhattanReview posted a reply to The Cyclepaths Bicycle Factory has 300 bicycles in stock. in the Data Sufficiency forum “Pl. see the following Venn diagram. https://i.postimg.cc/HcJ8kSmG/Bicycles.png The correct answer: D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses Princeton | ACT Prep Courses Dallas | New York IELTS Tutoring | and ...” July 8, 2019 Jay@ManhattanReview posted a reply to If x and y are greater than 0, is x = 1 ? in the Data Sufficiency forum “We have x > 0 and y > 0. We have to determine whether x = 1. Let''s take each statement one by one. (1) x/y = 1 Case 1: Say x = y = 1, the answer is Yes. Case 2: Say x = y = 2, the answer is No. No unique answer. Insufficient. (2) xy = 1 Case 1: Say x = y = 1, the answe is ...” July 8, 2019 Jay@ManhattanReview posted a reply to A 4-person task force is to be formed from the 4 men and 3 in the Problem Solving forum “The number of ways, 2 men can be selected out of 4 men = 4C2 = (4.3) / (1.2) = 6; The number of ways, 2 women can be selected out of 3 women = 3C2 = 3C1 = 1; note that nCr = nC(r – 1) Total number of ways the 4-person task force can be formed such that there are 2 men and 2 women in the task ...” July 8, 2019 Jay@ManhattanReview posted a reply to A certain list of 300 test scores has an arithmetic mean of in the Problem Solving forum “Nice question: Standard deviation (SD) is a number used to tell how measurements for a group are spread out from the average (mean), or expected value. A low standard deviation means that most of the numbers are close to the average. A high standard deviation means that the numbers are more ...” July 8, 2019 Jay@ManhattanReview posted a reply to The function f(a) is defined for all positive integers a as in the Problem Solving forum “Let us first understand the question. The function f(77) = # of positive integers between 1 and 76, inclusive minus the integers that have common factors with the factors of 77. Let''s break 77 into prime factorization. 77 = 7*11 The multiples (less than 77) of 7 and the multiples (less ...” July 8, 2019 Jay@ManhattanReview posted a reply to What is the value of the three-digit integer $$t$$ if $$t$$ in the Data Sufficiency forum “Let''s take each statement one by one. 1. The tens digit and the hundreds digit of $$t$$ are both $$7$$. => t = 77x; where x = units digit t/9 = 77x/9 gives x = 4, a unique value. Thus, t = 774. Sufficient. 2. The units digit of $$t$$ is less than both the tens digit and the hundreds ...” July 4, 2019 Jay@ManhattanReview posted a reply to Blair is shopping for a meal. He buys truffles, caviar, in the Data Sufficiency forum “Let the weights of the 4 items be a, b, c and d ounces. Let''s take each statement one by one. (1) Blair spent a total of$46.20 on items. => abcd = $46.20/4 = 4620/4 cents = 1155 cents => abcd = 1155 = 3*5*7*11; we cannot have other combination since quantities purchased is ...” July 4, 2019 Jay@ManhattanReview posted a reply to From a seven-member dance group, four will be chosen at in the Problem Solving forum “Number of ways such that any of the 4 dances are chosen randomly = 7C4; Number of ways such that Kori and Jason are selected and any of the remaining 2 dances are chosen randomly = 5C2; Required probability = 5C2 / 7C4 = 2/7 The correct answer: D Hope this helps! -Jay ...” July 4, 2019 Jay@ManhattanReview posted a reply to If a certain concrete mixture contains gravel, water, and in the Problem Solving forum “Given the concrete mixture contains gravel, water, and sand in a 1 to 3 to 5 ratio by weight, the weight of the mixture would be 1 + 3 + 5 = 9 lbs. To produce 72 pounds of the mixture, we will need 72*(1/9) = 8 lbs of gravel. The correct answer: E Hope this helps! -Jay ...” July 4, 2019 Jay@ManhattanReview posted a reply to What is the range of a set consisting of the first 100 multi in the Problem Solving forum “A few first multiples of 7 that are greater than 70 are 77, 84, 98, ...; we can write them as 7*11; 7*12: 7*13. So, the first multiple of 7 that is greater than 70 = 7*11; and the 100th multiple of 7 that is greater than 70 = 7*110 Thus, range = 7*110 – 7*11 = 7(110 – 11) = 7*99 = 693 ...” July 4, 2019 Jay@ManhattanReview posted a reply to In the correctly-worked multiplication problem above, each in the Data Sufficiency forum “Pl. find it here: https://www.beatthegmat.com/in-the-correctly-worked-multiplication-problem-above-each-s-t306765.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Prep Courses San Francisco | IELTS Prep Courses Boston | Seattle IELTS ...” June 20, 2019 Jay@ManhattanReview posted a reply to If x and y are integers and x<y, what is the value of x+y in the Data Sufficiency forum “Given: x and y are integers and x < y. We have to find out the value of x + y. Let''s take each statement one by one. (1) x^y = 4 Since x < y, we cannot have scerios such as 4^1 = 4 and 2^2 = 4. The only scenerio possible is (–2)^2 = 4; thus, x = y = –2 + 2 = 0. Sufficient. ...” June 20, 2019 Jay@ManhattanReview posted a reply to If $$y$$ is the sum of $$x$$ consecutive positive integers, in the Data Sufficiency forum “Given: $$y$$ is the sum of $$x$$ consecutive positive integers, and $$x>3$$. We have to determine whether $$y$$ odd. Let''s take each statement one by one. 1) $$x$$ is odd. Case 1: Say there are 5 (odd) consecutive positive integers, starting from 1; thus, the numbers are 1, 2, 3, 4, ...” June 20, 2019 Jay@ManhattanReview posted a reply to If p and q are two consecutive positive integers and pq= 30x in the Data Sufficiency forum “Since p and q are two consecutive positive integers, we have q = p + 1. We have to determine whether pq = p(p + 1) = 30x. Let''s take each statement one by one. 1) p^2 is divisible by 25. => p is divisible by 5. Say p = 5m; thus, q = 5m + 1; m is a positive integer From p(p + 1) = ...” June 19, 2019 Jay@ManhattanReview posted a reply to A weighted coin has a probability p of showing heads. Is the in the Data Sufficiency forum “Say the probability of getting a head = p; thus, the probability of getting tail = 1 – p. We have to determine whether p > 0.2. Let''s take each statement one by one. (1) Successive flips are independent, and the probability of getting at least one head in two flips is greater than ...” June 19, 2019 Jay@ManhattanReview posted a reply to If $$\frac{(ab)^2+3ab-18}{(a-1)(a-2)}=0$$ where $$a$$ and in the Problem Solving forum “Given that $$\frac{\left(ab\right)^2+3ab-18}{\left(a-1\right)\left(a+2\right)}=0$$, we have (ab)^2 + 3ab – 18 = 0 => (ab)^2 + 6ab – 3ab – 18 = 0 ab(ab + 6) – 3(ab + 6) = 0 (ab + 6)*(ab – 3) = 0 => ab = –6 or 3 Let''s take each option one by one. I. 1 : If b = 1, ...” June 18, 2019 Jay@ManhattanReview posted a reply to What is the area of the quadrilateral bounded by the... in the Problem Solving forum “By plugging-in x = 0, in the first two equations, we get coordinates of two vertices: 1. (0, 6) and (0, –6). Similarly, plugging-in y = 0, in the first two equations, we get coordinates of the other two vertices: 1. (8, 0) and (–8, 0). With these 4 vertices, we get a quadrilateral. The area ...” June 18, 2019 Jay@ManhattanReview posted a reply to In the diagram above, angle $$C=90^o$$ and $$AC=BC$$. Point in the Problem Solving forum “Since the question wants the answer in ratio, we can assume a convenient value for the sides of the triangle. Say for the rightangled triangle, AC = BC = 1; thus, hypotenuse, AB = √2 Given that Arc $$AXB$$ has its center at $$C$$ and passes through $$A$$ and $$B$$, area of segment AXBCA = ...” June 18, 2019 Jay@ManhattanReview posted a reply to After a fisherman sold 1/4 of the fish he had caught and in the Problem Solving forum “Say the fisherman caught x numbers of fish. Thus, he sold = x/4 numbers of fish; remaining = x – x/4 = 3x/4 number of fish donated = 2/3 of 3x/4 = x/2; remaining = 3x/4 – x/2 = x/4 We are given that x /4 = 4; thus, x = 4*4 = 16 The correct answer: B Hope this helps! -Jay ...” June 18, 2019 Jay@ManhattanReview posted a reply to If a^n ≠ 0 and n is a positive integer, is n odd? in the Data Sufficiency forum “Let''s take each statement one by one. (1) a^n + a^(n+1) < 0 a^n + a^n*a < 0 a^n*(1 + a) < 0 We see that the product of a^n and (1 + a) is less than 0 or is negative. So, either a^n is negative and (1 + a) is positive or vice-versa. Case 1: Taking a as negative and (1 + ...” June 12, 2019 Jay@ManhattanReview posted a reply to If Beth spent$400 of her earnings last month on rent, how in the Data Sufficiency forum
“Let''s take each statement one by one. (1) Beth saved 1/3 of her earnings last month and spent half of the remainder on rent. Given Beth saved 1/3 of her earnings last month, she spent 1 – 1/3 = 2/3 of her earnings last month. Part spent on rent = 1/2 of 2/3 = 1/3 of her earnings last ...”
June 12, 2019
Jay@ManhattanReview posted a reply to In the diagram above, what is the circumference of the in the Data Sufficiency forum
“We see that /_A = 90º; thus, ∆ABC is a right-angled triangle. And we know that only the diameter subtends an angle of 90º at the circumference of the circle. Thus, BC is the diameter. If we get the value of BC, we will get the value of circumference of the circle. Let''s take each statement ...”
June 12, 2019
Jay@ManhattanReview posted a reply to To celebrate a colleague's retirement, the T coworkers in an in the Problem Solving forum
“Desired share from each = X/T; The actual share of (T – S) coworkers = X/(T – S) Additional amount by each coworker = X/(T – S) – X/T = SX/T(T – S) The correct answer: D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL ...”
June 11, 2019
Jay@ManhattanReview posted a reply to A pod of 6 dolphins always swims single file, with 3 females in the Problem Solving forum
“With the given constraint, the 3 females can arrange themselves in 3! = 6 ways; similarly, the 3 males can arrange themselves in 3! = 6 ways. Thus, the total number of ways = 6*6 = 36. The correct answer: B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: ...”
June 11, 2019
Jay@ManhattanReview posted a reply to x is a positive integer.find the value of x. in the Data Sufficiency forum
“Let''s take each statement one by one. 1) LCM of x and 26 is 52. We see that LCM = 52 = 2^2*13 and 26 = 2*13; thus, x can be either 2^2 = 4 or 2^2*13 = 52. No unique answer. Insufficient. 2) LCM of x and 10 is 20. In the same way, x can be either 2 or 20. No unique answer. Insufficient. ...”
June 11, 2019
Jay@ManhattanReview posted a reply to Fractions question. Don't have any clue about it. in the Problem Solving forum
“Given (x-2)^4/4 + (y+2)^4/9 = 4, we can note that since the exponents are even (4) for both (x-2)^4/4 and (y+2)^4/9, they are non-negative numbers . Thus, two non-negative numbers add up 4. To get the maximum value of x, we must have the maximum value of (x-2)^4/4. This follows that we must have ...”
June 11, 2019
Jay@ManhattanReview posted a reply to Franklin’s wage increased by what percent? in the Data Sufficiency forum
“Say initially, Franklin’s wage was $x and after the increase, it is$y. Thus, Franklin’s wage increased by (y – x)*100%/x. We have to get the value of (y – x)*100%/x. Let''s take each statement one by one. (1) Franklin’s wage after the increase was $45,000. => y = 45,000. We ...” June 10, 2019 Jay@ManhattanReview posted a reply to For any numbers a and b, a#b=a + b - ab. If a#b=0, which of in the Problem Solving forum “We have a#b = a + b – ab = 0 From a + b – ab = 0, we have a = 1/(b – 1) Since if b = 1, the value of a would be indeterminable, we have b ≠ 1. The correct answer: B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep ...” June 10, 2019 Jay@ManhattanReview posted a reply to If a and b are odd integers, a Δ b represents the product o in the Problem Solving forum “We have 3 Δ 47 = 3*5*7*9 ....*47. We see that the largest prime number that divides 3 Δ 47 is 47. Note that (3 Δ 47) and (3 Δ 47) + 2 are consecutive odd numbers; thus, they are co-prime to each other. It means that no factor between them is common. Now since (3 Δ 47) + 2 is an odd number, ...” June 10, 2019 Jay@ManhattanReview posted a reply to When the integer n is divided by 6, the remainder is 3, Whic in the Problem Solving forum “Say the quotient when the integer n is divided by 6, with the remainder 3 is q. Thus, n = 6q + 3 Let''s take each option one by one. (A) n – 3 => n – 3 = 6q + 3 – 3 = 6q. We see that 6q is a multiple of 6; thus, not the correct answer. (B) n + 3 => n + 3 = 6q + 3 + 3 = 6q + 6 ...” June 10, 2019 Jay@ManhattanReview posted a reply to Ann deposited money into two new accounts, A and B. Account in the Data Sufficiency forum “Say Ann deposited$A in Account A and $B in Account B. Thus, she earned 5A/100 =$A/20 in the first year from Account A and earned 8B/100 = $2B/25 in the first year from Account B. We have to get the value of 2B/25 – A/20. Let''s take each statement one by one. 1) Ann deposited$200 ...”
June 7, 2019
Jay@ManhattanReview posted a reply to Machines X and Y produced identical bottles at different con in the Data Sufficiency forum
“Say Machine X filled X bottles in 4 hours; thus, Machine X''s rate = X/4 bottles per hour; and Machine Y filled X bottles in 3 hours; thus, Machine Y''s rate = Y/3 bottles per hour We have to find out in how many hours will Machine X will fill (X + Y) bottles. It will take (4 + 4Y/X) hours. ...”
June 7, 2019
Jay@ManhattanReview posted a reply to At 11 AM, Abraham leaves from his home for meeting that is in the Data Sufficiency forum
“Starting at 11 am, Abraham must reach within 2 hours, else he''s late. Let''s take each statement one by one. 1) The venue of the meeting is less than 120 kilometers away. Even if we take the maximum distance = 120 miles and minimum speed = 60 mph, he reaches office in 120/60 = 2 hours. So, ...”
June 6, 2019
Jay@ManhattanReview posted a reply to On a particular trip, Jane drove x miles at 30 miles per in the Data Sufficiency forum
“Average speed = Total Distance / Total Time Total Distance = (x + y) miles Total Time = (x/30 + y/40) hours Thus, Average speed = (x + y) / (x/30 + y/40) We have to determine whether (x + y) / (x/30 + y/40) > 35 Upon solving (x + y) / (x/30 + y/40) > 35, we get y/x > 4/3. Only ...”
June 6, 2019
Jay@ManhattanReview posted a reply to On July 1 of last year, total employees at company E was in the Problem Solving forum
“Since we have to deal with percent values and absolute value in the sight, we can assume convenient values, 100. Total no. of employees (Before) = 100 (assumed value) Total salary (Before) = 100 (assumed value) Average salary (Before) = 100/100 = $1 per employee Total no. of employees ...” June 6, 2019 Jay@ManhattanReview posted a reply to If a total of 30 puppies is displayed in the two windows of in the Data Sufficiency forum “Since we do not know out of 30, how many puppies are on the left and on the right, we cannot calculate how many of the puppies are female. Insufficient. Let''s see how. Say there are x number of puppies on the left, thus, there are (30 – x) number of puppies on the right. From Statement ...” June 4, 2019 Jay@ManhattanReview posted a reply to Is x > 0.05? in the Data Sufficiency forum “Let''s take each statement one by one. (1) x > 3/40. => x > 0.075. Since x > 0.075, it is greater than 0.05. Sufficient. (2) x is greater than 3 percent of 50. => x > 3% of 50 x > 3*50/100 x > 1.5. Since x > 1.5, it is greater than 0.05. Sufficient. The ...” June 4, 2019 Jay@ManhattanReview posted a reply to The number line shown contains three points R, S, and T, in the Problem Solving forum “Pl. add the image. It is missing. _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring San Francisco | IELTS Prep Courses Austin | Seattle IELTS Tutoring | and many more... Schedule your free consultation with an experienced GMAT Prep Advisor! Click here.” June 4, 2019 Jay@ManhattanReview posted a reply to Pat has a pocket full of quarters, dimes, and nickels. He in the Problem Solving forum “Say the number of quarters, dimes, and nickels Pat has are x, y and z, respectively. It is known that x, y and z are positive integers. Since the question ask for the number of nickles, Pat must have either quarters, and nickels or dimes, and nickels Case 1: Say Pat has 6 coins that are ...” June 3, 2019 Jay@ManhattanReview posted a reply to Each of the 200 students in a class enrolled in at least one in the Problem Solving forum “Say, the number of participants in Physics = P = 30; the number of participants in Chemistry = C = 150; the number of participants in Mathematics = M = 100; the number of participants in Physics as well as Chemistry = PC; the number of participants in Physics as well as Mathematics = PM; ...” June 3, 2019 Jay@ManhattanReview posted a reply to In a sequence of 40 numbers, each term, except for the first in the Problem Solving forum “Say the first term = a; thus, the 2nd term = a – 7; the 3rd term = a – 7 – 7 = a – 2*7; the 4th term = a – 3*7; Thus, the 40th term = a – 39*7 Since terms are decreasing in value, the smallest term would be the 40th term and the greatest term would be the first term = a = 281. ...” June 3, 2019 Jay@ManhattanReview posted a reply to Five friends play blackjack in Las Vegas and lose an average in the Problem Solving forum “Given that the average is$100 each, total loss of five friends = 5*100 = $500. It is also given that two friends lost a total of$380; thus, the other three friends together have lost 500 – 380 = $120. Thus, the average loss of the other three friends = 120/3 =$40. The correct answer: ...”
June 3, 2019
Jay@ManhattanReview posted a reply to 55 people live in an apartment complex with three fitness in the Data Sufficiency forum
“Given that 40 residents are members of exactly one of the three fitness clubs, we have 55 – 40 = 15 residents who are members of (1) A and C clubs (2) A and B clubs (3) B and C clubs and (4) all three clubs (5) no club Say, the number of residents who are members of A and B clubs = AB; ...”
May 22, 2019
Jay@ManhattanReview posted a reply to A certain wooded lot contains 56 oak trees. How many pine in the Data Sufficiency forum
“Given: There are 56 oak trees. We have to determine the number of pine trees. Let''s take each statement one by one. 1) The ratio of the number of oak trees to the number of pine trees in the lot is 8 to 5. => If there are 8 oak trees, then there are 5 pine trees. Since there are 56 = ...”
May 22, 2019
Jay@ManhattanReview posted a reply to Jean is arranging paint brushes used by artists for an in the Problem Solving forum
“Since all the brushes of Van Gogh brushes are together, we can count 1 brush So, we have Van Gogh = 1 Monet = 5 Manet = 3 Degas = 4 Toulouse-Lautrec = 2 Total number of ways to arrange 15 brushes = (1 + 5 + 3 + 4 + 2)! = 15! However, since all brushes from the same artist are ...”
May 22, 2019
Jay@ManhattanReview posted a reply to When positive integer $$n$$ is divided by 3, the remainder in the Problem Solving forum
“Given that the positive integer $$n$$ is divided by 3, and the remainder is 1, we have n, one among 4, 7, 13, 16, 19, 22 ... Also, given that the positive integer $$n$$ is divided by 7, and the remainder is 5, we have n, one among 12, 19, 26, ... The smallest common value for n is 19. Since ...”
May 22, 2019
Jay@ManhattanReview posted a reply to In the Land of Oz, only one or two-letter words are used. in the Problem Solving forum
“Hi, You only had posted this question previously. Here it is: https://www.beatthegmat.com/in-the-land-of-oz-only-one-or-two-letter-words-are-used-t302027.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring San Antonio | GRE ...”
May 22, 2019
Jay@ManhattanReview posted a reply to If the speed of $$X$$ meters per second is equivalent to the in the Problem Solving forum
“We have $$X$$ meters per second = $$Y$$ kilometers per hour => $$X$$ meters per second = $$Y$$ * (1,000/3,600) meters per second $$X$$ = $$Y$$ * (5/18) $$Y$$ = $$18X/5$$ The correct answer: C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE ...”
May 22, 2019
Jay@ManhattanReview posted a reply to If integer C is randomly selected from 20 to 99, inclusive. in the Problem Solving forum
“We have to determine whether C^3 – C is divisible by 12. C^3 – C = C(C^2 – 1) = C(C – 1)(C + 1) = (C – 1)C(C + 1) = Product of three consecutive integers This question can be solved taking few sample values of C from 20 to 99, inclusive. Note that from 20 to 99, inclusive, there are ...”
May 17, 2019
Jay@ManhattanReview posted a reply to If Jay has 99 problems, in how many ways can he select k of in the Data Sufficiency forum
“Repeat entry. Already answered. https://www.beatthegmat.com/if-jay-has-99-problems-in-how-many-ways-can-he-select-k-of-t305204.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring Tampa | GRE Prep Courses Seattle | Boston IELTS ...”
May 17, 2019
Jay@ManhattanReview posted a reply to A chef mixes P ounces of 60% sugar solution with Q ounces of in the Data Sufficiency forum
“From the given information, we have R = P + Q From the first solution, we have Sugar content = 60% of P = 0.6P; and Water content = 40% of P = 0.4P From the second solution, we have Sugar content = 10% of Q = 0.1Q; and Water content = 90% of Q = 0.9Q Total sugar content = 0.6P + ...”
May 15, 2019
Jay@ManhattanReview posted a reply to In the xy-plane, if line k has negative slope, is the in the Data Sufficiency forum
“Say the equation of the line is y = mx + c, where m is the slope and c is the y-intercept of the line Since it is given that line k has a negative slope, we have m < 0 Thus, we can write the equation as y =–|m|x + c We have to determine whether c < 0. Let''s take each statement ...”
May 15, 2019
Jay@ManhattanReview posted a reply to In the xy-coordinate system, rectangle ABCD is inscribed in the Problem Solving forum
“https://i.postimg.cc/XXkP1cwW/Screenshot-2019-05-15-at-2-06-52-PM.png The equation of the circle x^2 + y^2 = 25 suggests that the given circle has its center at the origin and radius equal to √25 = 5. Thus, AD = 2*5 = 10 = Diameter. Since AD lies on the X-axis, the coordinate of A = (–5, 0) ...”
May 15, 2019
Jay@ManhattanReview posted a reply to The equation (M + 6)/36 = (p – 7)/21 relates two temperatu in the Problem Solving forum
“We are given (M + 6)/36 = (P – 7)/21 Multiplying each side by 3, we have 3*E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring Houston | SAT Prep Courses Seattle | Charlotte IELTS Tutoring | and many more... Schedule your ...”
May 6, 2019
Jay@ManhattanReview posted a reply to $$\frac{5+5\sqrt{5}}{10+\sqrt{500}}=$$ in the Problem Solving forum
“We have $$\frac{5+5\sqrt{5}}{10+\sqrt{500}}$$ $$\frac{5(1+\sqrt{5})}{10+\sqrt{5\times100}}$$ $$\frac{5(1+\sqrt{5})}{10+\sqrt{5\times10^2}}$$ $$\frac{5(1+\sqrt{5})}{10+10\sqrt{5}}$$ $$\frac{5(1+\sqrt{5})}{10(1+\sqrt{5})}$$ $$\frac{1}{2}$$ The correct answer: A Hope this helps! -Jay ...”
May 6, 2019
Jay@ManhattanReview posted a reply to If the mean of list A is 6.8 and the standard deviation is in the Problem Solving forum
“The range for elements within 1 unit of standard deviation is given by (6.8 – 3.6) – (6.8 + 3.6) => 3.2 – 10.4 The elements within 3.2 – 10.4 range are 9, 6, 9, 10, 7, 4, and 5. There are 7 elements. The correct answer: E Hope this helps! -Jay _________________ Manhattan ...”
May 6, 2019
Jay@ManhattanReview posted a reply to The product of n consecutive integers equals P. in the Problem Solving forum
“Since there are at least two integers (given that n ≥ 2), the product of n integers must be even (we have at least one 2 in P). So, Statement I is correct, therefore, Statement II is incorrect. Statement III is not must be true. Let''s take an example: Say, the n consecutive integers are –3, ...”
May 6, 2019
Jay@ManhattanReview posted a reply to In a set of five consecutive integers, which of the followin in the Problem Solving forum
“Say the five consecutive integers are 1, 2, 3, 4 and 5. Thus, we have Median = 3 and Mean = 3. We have to choose an option that will change the mean but not the median. Let''s take each option one by one. A. Multiplying each of the numbers in the set by 6. Number would be 6, 12, 18, 24, and ...”
May 6, 2019
Jay@ManhattanReview posted a reply to If a < b < 0, which of the following must be true? in the Problem Solving forum
“Given that a < b < 0, we know that both a and b are negative and the absolute value of a is greater than that of b; thus, though a < b, we have |a| > |b|. We can take suitable values for a and b. Say a = – 3 and b = –2. Lets'' take each option one by one. A. a^2 < b^2 ...”
May 6, 2019
Jay@ManhattanReview posted a reply to If $$\left(6+\frac{2}{x}\right)\left(x-4\right)=0,$$ and in the Problem Solving forum
“We see that the product of two expressions is 0; for the product to be 0, at least one of the two expressions must be 0. Since x ≠ 0, the term x – 4 ≠ 0; thus, (6 + 2/x) must be 0. (6 + 2/x) = 0 => x = –1/3 The correct answer: C Hope this helps! -Jay _________________ ...”
May 6, 2019
Jay@ManhattanReview posted a reply to 8 cities, including Memphis, are finalists to be chosen to in the Data Sufficiency forum
“See this: https://www.beatthegmat.com/mgmat-cat-6-t81455.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring Houston | SAT Prep Courses Seattle | Charlotte IELTS Tutoring | and many more... Schedule your free consultation with ...”
May 5, 2019
Jay@ManhattanReview posted a reply to Last Thursday, John assembled chairs at a rate of 3 chairs in the Data Sufficiency forum
“See here: https://www.beatthegmat.com/work-rate-t305671.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Tutoring Houston | SAT Prep Courses Seattle | Charlotte IELTS Tutoring | and many more... Schedule your free consultation with ...”
May 5, 2019
Jay@ManhattanReview posted a reply to How many options are there for license plate number if each in the Problem Solving forum
“Number of ways each license plate can include 2 digits and 3 letters (in that order) = 10^2 * 26^3; (there are 10 digits, incl 0; note that digits and alphabets can repeat) Number of ways each license plate can include 3 digits and 2 letters (in that order) = 10^3 * 26^2 Total number of ways = ...”
May 5, 2019
Jay@ManhattanReview posted a reply to If x is not equal to -y, is (x-y)/(x+y) > 1? in the Data Sufficiency forum
“Given: x ≠ –y or x + y ≠ 0. We have to determine whether (x – y)/(x + y) > 1 Let''s take each statement one by one. (1) x > 0 Case 1: Say x = 1 and y = 2 Thus, we have (x – y)/(x + y) = (1 – 2)/(1 + 2) = –1/3 < 1. The asnwer is no. Case 2: Say x = 2 and y = ...”
May 3, 2019
Jay@ManhattanReview posted a reply to A child bought candy that cost $$85$$ cents. If the child in the Data Sufficiency forum
“Say the child uses x quarters, y dimes, and z nickels. Thus, we have 25x + 10y + 5z = 85 => 5x + 2y + z = 17 ---(1) We have to determine whether x ≥ 2. Let''s take each statement one by one. 1) The child used 8 coins. => x + y + z = 8 ---(2) Case 1: Say x = 1 Thus, ...”
May 3, 2019
Jay@ManhattanReview posted a reply to The length, width, and height of a rectangular box in the Data Sufficiency forum
“With the given information, we have Volume of the box = V = LWH; and Area of the box = A = 2(LW + WH + LH) Thus, V/A = LWH / 2(LW + WH + LH) Let''s take each statement one by one. (1) At least 2 of L, W, and H are equal to 5. We do not know the value of the third side, we can''t get ...”
May 3, 2019
Jay@ManhattanReview posted a reply to Is quadrilateral PQRS a parallelogram? in the Data Sufficiency forum
“For the quadrilateral PQRS to be a parallelogram, the opposite or facing sides of a parallelogram are of equal length and the opposite angles of a parallelogram are of equal measure. Let''s take each statement one by one. (1) Adjacent sides PQ and QR have the same length. The opposite ...”
May 2, 2019
Jay@ManhattanReview posted a reply to A craftsperson made 126 ornaments and put them all into in the Data Sufficiency forum
“Say there are x numbers of boxes that contained 6 ornaments and y numbers of boxes that contained 24 ornaments; thus, we have 6x + 24y = 126 x + 4y = 21 y = (21 – x)/4 We have to get the value of y. (1) Fewer than 4 of the boxes contained 6 ornaments. => x: { 1, 2, 3} Since x ...”
May 2, 2019
Jay@ManhattanReview posted a reply to A company produces a certain toy in only 2 sizes, small or in the Data Sufficiency forum
“Say the company produces x numbers of small and y numbers of large toys. Thus, Number of red toys = Number of green toys =x/2 + y/2 = (x + y)/2 We have to get the value of y / B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT ...”
May 2, 2019
Jay@ManhattanReview posted a reply to After the first two terms in a sequence of numbers, each in the Data Sufficiency forum
“Say the first two terms are a and b, respectively. Thus, the first five terms are a, b, (a + b), 2(a + b), 4(a + b). We have to determine whether 4(a + b) = 12 or (a + b) = 3. Let''s take each statement one by one. (1) The sum of the first 3 terms in the sequence is 6. => The ...”
May 2, 2019
Jay@ManhattanReview posted a reply to Jones has worked at Firm X twice as many years as Green in the Data Sufficiency forum
“Say Jones worked for J years, Green G years, and Smith S years in Firm X. Thus, J = 2G and G = S + 4 We have to get the value fo G. Let''s take each statement one by one. (1) Jones has worked at Firm X 9 years longer than Smith. J = S + 9 From J = 2G, G = S + 4, and J = S + 9, we ...”
May 2, 2019
Jay@ManhattanReview posted a reply to A noncompressible ball in the shape of a sphere is to in the Data Sufficiency forum
“Let''s take each statement one by one. (1) The radius of the ball is equal to 2 inches. Certainly insufficient. The square of any dimension: sufficient enough to let the ball pass to very large. (2) The square opening is the smallest square opening through which the ball will fit. ...”
May 2, 2019
Jay@ManhattanReview posted a reply to What is the value of 2/(2−√2)? in the Problem Solving forum
“We have $$\frac{2}{2-\sqrt{2}}$$ Let''s rationalize the denominator Multiplying $$\frac{2}{2-\sqrt{2}}$$ by $$\frac{2+\sqrt{2}}{2+\sqrt{2}}$$; this will not chnage the value of the fraction. $$\frac{2}{2-\sqrt{2}}$$ * $$\frac{2+\sqrt{2}}{2+\sqrt{2}}$$ ...”
May 1, 2019
Jay@ManhattanReview posted a reply to What is the slope of the line defined by the equation in the Problem Solving forum
“Slope of a line is m for a linear equation $$y = mx + c$$ So, let''s manipulate the equation of the line $$2x - 3y = 9$$ into $$y = mx + c$$. $$2x - 3y = 9$$ => $$-3y = 9-2x$$ => $$y = \frac {9}{-3} - \frac {2x}{-3}$$ => $$y = -3 + \frac {2}{3}x$$ Thus, slope = 2/3 The correct ...”
May 1, 2019
Jay@ManhattanReview posted a reply to If $$\frac{2.25\cdot10^a}{0.15\cdot10^b}=1.5\cdot10^3,$$ in the Problem Solving forum
“We have $$\frac{2.25\cdot10^a}{0.15\cdot10^b}=1.5\cdot10^3,$$ $$\frac{225\cdot10^a}{15\cdot10^b}=1.5\cdot10^3,$$ $$(15\cdot10^{(a – b)})=1.5\cdot10^3,$$ $$(1.5\cdot10\cdot10^{(a – b)})=1.5\cdot10^3,$$ $$(10^{(a – b + 1)})=10^3,$$ => a – b + 1 = 3 a – b = 2 The ...”
May 1, 2019
Jay@ManhattanReview posted a reply to In the figure above, circles with centers A and B are in the Problem Solving forum
“The area of the shaded region = 90 – Area of two circles To get the area of the circles, we need radius. Since the area of the rectangle, JKLM is 90, we have KJ * KL = 90 => KJ * 15 = 90 => KJ = 6 Radius of the circle = KJ/2 = 6/2 = 3 Thus, area of a circle = π*3^2 = 9π ...”
May 1, 2019
Jay@ManhattanReview posted a reply to What is the units digit of 18^47 ? in the Problem Solving forum
“The units digit of 18^47 is the same as the units digit of 8^47. Power cycle of 8: 8^1 = 8; 8^2 = ...4; 8^3 = ...2; 8^4 = ...6; 8^5 = ...8; 8^6 = ...4; 8^7 = ...2; 8^8 = ...6; So the units digit of 8 in power cycle repeats a pattern of 4 numbers: 8, 4, 2, and 6 We have 18^47 = ...”
May 1, 2019
Jay@ManhattanReview posted a reply to Jack picked 76 apples. Of these, he sold 4y apples to... in the Data Sufficiency forum
“Say Jack is left with x apples. We have to get the unique value of x. So, we have x = 76 – 4y – 3t; given that x, t and y are positive integers Let''s take each statement one by one. (1) y ≥ 15 and t = 2 Case 1: Say y = 15 and t = 2 We have x = 76 – 4y – 3t => x = 76 ...”
April 30, 2019
Jay@ManhattanReview posted a reply to A 6-sided die has 3 black sides and 3 white sides. If the in the Problem Solving forum
“Since the 6-sided die has 3 black sides and 3 white sides, i.e., an equal number of black and white sides, the probability of getting a black side up = 1/2 Instead of calculating the probability that, on at least one of the throws, the die will land with a black side up, let''s calculate the ...”
April 30, 2019
Jay@ManhattanReview posted a reply to A carpenter worked alone for 1 day on a job that would in the Problem Solving forum
“Given that the first carpenter worked alone for 1 day on a job that would take him 6 more days to finish, the rate of the first carpenter = 1/7 Since 1-day work of the first carpenter is done, the part of work remaining = 1 – 1/7 = 6/7 Again, given that the first carpenter and the second ...”
April 30, 2019
Jay@ManhattanReview posted a reply to Geoff is setting up an aquarium and must choose 4 of 6 in the Problem Solving forum
“Number of different combinations of fish and plants Geoff can choose = 6C4 * 3C2 = 6C2 * 3C1 = (6.5/1.2) * 3 = 45 The correct answer: D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep Courses New York | IELTS Prep Courses Boston ...”
April 30, 2019
Jay@ManhattanReview posted a reply to Which of the following describes all values of x for which in the Problem Solving forum
“We are given that 1 – x^2 ≥ 0 => 1 ≥ x^2. This implies that the absolute value of x must not exceed 1. Thus, we have –1 ≤ x ≤ 1. The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep Courses New ...”
April 30, 2019
Jay@ManhattanReview posted a reply to A committee is to be created from some employees at Bongo in the Problem Solving forum
“Number of different committees are possible = 5C3 * 6C4 = 5C2 * 6C2 = (5.4/1.2) *(6.5/1.2) = 150 The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep Courses Boston | IELTS Prep Courses San Francisco | ...”
April 29, 2019
Jay@ManhattanReview posted a reply to For which of the following values of x is.... in the Problem Solving forum
“For $$\sqrt{1-\sqrt{2-\sqrt{x}}}$$ to be a real number √(2 – √x) must be non-negative. Thus, 2 – √x ≥ 0 => 0 ≤ x ≤ 4. Thus, the correct answer is E, x = 5. The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE ...”
April 29, 2019
Jay@ManhattanReview posted a reply to Of the 13 employees in a certain department, 1 has an annual in the Problem Solving forum
“Since there are 13 employees, the employee with the median salary would be the 7th one Salaries | # of empD Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep Courses Boston | IELTS Prep Courses San Francisco | Philadelphia ACT ...”
April 29, 2019
Jay@ManhattanReview posted a reply to If 25% of the employees at a firm did not take a vacation in the Data Sufficiency forum
“See the image below, which is self-explanatory. https://i.postimg.cc/v1v3bk1B/Picture1.png The correct answer: C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep Courses San Diego | IELTS Prep Courses Denver | San Francisco ACT ...”
April 26, 2019
Jay@ManhattanReview posted a reply to If $$w, y$$, and $$z$$ are positive integers, and in the Data Sufficiency forum
“The optimum approach would be to test values. Given: $$w, y$$, and $$z$$ are positive integers, and $$w = y – z$$ We have to find out whether $$w$$ is a perfect square. Let''s take each statement one by one. 1) $$y + z$$ is a perfect square. Case 1: Say y = 5 and z = 4. We see that ...”
April 26, 2019
Jay@ManhattanReview posted a reply to Of the 60 families in a certain neighborhood, 38 have a cat. in the Data Sufficiency forum
“Say, the number of families that have only dogs = d; the number of families that have only cats = c; the number of families that have both cats and dogs = b; the number of families that have neither cat nor dog = n From the given information, we have d + c + b + n = 60 and b + c = 38; thus, ...”
April 26, 2019
Jay@ManhattanReview posted a reply to At a dinner party, 5 people are to be seated around a in the Problem Solving forum
“Note that the number of distinct arrangments of n distinguishable objects to be placed in a row = n!; while that the number of distinct arrangments of n distinguishable objects to be placed in a circle = (n – 1)! It is because, in the case of arrangement in a circle, two seating arrangements ...”
April 26, 2019
Jay@ManhattanReview posted a reply to If one manual weighs 400 grams, how many kilograms does a in the Problem Solving forum
“48 manuals = 48*400 gms = 48*400/1,000 kg = 19.2 kg. The correct answer: C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | TOEFL Prep Courses San Diego | IELTS Prep Courses Denver | San Francisco ACT Tutoring | and many more... Schedule ...”
April 26, 2019
Jay@ManhattanReview posted a reply to In a certain year the United Nations' total expenditures in the Data Sufficiency forum
“Given that 67.8 percent was paid by 6 highest-contributing countries, we have 100 – 67.8 = 32.2 percent was paid by 153 countries, We have to determine whether Country X is one among 6 highest-contributing countries. Let''s take each statement one by one. 1) 56 percent of the total ...”
April 25, 2019
Jay@ManhattanReview posted a reply to In nine independent trials, what is the probability that in the Data Sufficiency forum
“Instead of calculating the probability that Outcome A happens at least once, it''s better we calculate the probability that Outcome A does not happen even once; once we get this value, we would deduct it from 1 and get the answer. Probability that Outcome A happens at least once = 1 – ...”
April 25, 2019
Jay@ManhattanReview posted a reply to On Monday a store had a sale on bottles of juice S and juice in the Data Sufficiency forum
“Let''s take each statement one by one. 1) Two-thirds of the total number of bottles of juice T in stock were sold on Monday. => 2/3 of T and 1/2 of S were sold. We don''t know the values of S and T to compare. Insufficient. (2) At the beginning of the sale, there was a total of 90 ...”
April 25, 2019
Jay@ManhattanReview posted a reply to Is x negative? in the Data Sufficiency forum
“Let''s take each statement one by one. (1) x^3(1 – x^2) < 0 Since x^3(1 – x^2) is less than 0, x cannot be 0. From x^3(1 – x^2) < 0, we have x^3 – x^5 < 0. Divinding the inequality throught by x^2, we get x < x^2. From x < x^2, we get Case 1: Say x = 2, then x^2 ...”
April 25, 2019
Jay@ManhattanReview posted a reply to Of the 60 animals on a certain farm, 2/3 are either pigs or in the Data Sufficiency forum
“Given that of the 60 animals, 2/3 are either pigs or cows, we have cows + pigs = 2/3 of 60 = 40 Say the number of cows = c and the number of pigs = p Thus, c + p = 40 We have to get the value of c. Let''s take each statement one by one. (1) The farm has more than twice as many cows as ...”
April 25, 2019
Jay@ManhattanReview posted a reply to Out of a total of 1,000 employees at a certain corporation, in the Problem Solving forum
“Given that 60 percent of the total number of employees (1,000) work in research, the number of employees working in research = 60% of 1,000 = 600 Thus, the number of employees who do not work in research = 1,000 – 600 = 400 ---(1) Given that out of a total of 1,000 employees, 52 percent are ...”
April 25, 2019
Jay@ManhattanReview posted a reply to B is a two-digit number, which can be expressed as the in the Data Sufficiency forum
“Already replied on 9th April. https://www.beatthegmat.com/b-is-a-two-digit-number-which-can-be-expressed-as-the-t307389.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GRE Manhattan | ACT Prep Courses San Diego | IELTS Prep Courses Seattle | Dallas IELTS ...”
April 23, 2019
Jay@ManhattanReview posted a reply to If A and B are positive integers, is the product AB even? in the Data Sufficiency forum
“For AB to be even, at least one between A and B must be even. AB would be odd only if both A and B are odd. Let''s take each statement one by one. 1) The sum A + B is odd. Since A + B is odd, one between A and B is even and the other is odd. Thus, AB is even, Sufficient. 2) A is even. ...”
April 23, 2019
Jay@ManhattanReview posted a reply to The third-place finisher of the Allen County hot dog eating in the Data Sufficiency forum
“Sat the third-place finisher ate T hot dogs and the winner ate W hot dogs. We have to get the value of W. Let''s take each statement one by one. 1) The winner consumed 24 more hot dogs than did the third-place finisher. > W = 24 + T. Insufficient. 2) The winner consumed hot dogs at ...”
April 23, 2019
Jay@ManhattanReview posted a reply to Practice Quant problem in the GMAT Math forum
“We have {2^D Alternate approach: Since we can choose any value for x or y given that xy = 1, say x = y = 1 Thus, (x + y)^2 = (1 + 1)^2 = 2^2 = 4 and (x – y)^2 = (1 – 1)^2 = 0^2 = 0 {2^[(x+y)^2]}/{2^[(x-y)^2]} = {2^4}/{2^0} = 16/1 = 16 -- Correct answer is D. Hope this helps! ...”
April 23, 2019
Jay@ManhattanReview posted a reply to In the figure above, line segment AD is the diameter of in the Problem Solving forum
“We have OA = Radius of circle O = 4; thus, OB = OC = 2 Say the radius of circle E = x Thus, BE =2 + x In the ∆EOB, EO is perpendicular to OB, thus, /_EOB = 90º and EO = Radius of circle O – x = 4 – x Thus, ∆EOB is a right angle triangle. Applying Pythagoras theorem, we have ...”
April 23, 2019
Jay@ManhattanReview posted a reply to If stock is sold three months after it is purchased, the for in the Problem Solving forum
“From the given information, we have P = $400, S =$420, and D = $5 Thus, r = 400(5 + 420 – 400)/400 = 25 The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses Princeton | ACT Prep Courses Dallas | ...” April 22, 2019 Jay@ManhattanReview posted a reply to A certain car averages 25 miles per gallon when driving in the Problem Solving forum “Time taken to drive 10 miles in city = 10/25 = 2/5 hours; Time taken to drive 50 miles in city = 50/40 = 5/4 hours Total time taken = 2/5 + 5/4 = 33/20 hours Total distance = 10 + 50 = 60 miles Average speed = Total distance / Total time = 60 / (33/20) = appx 36 miles per hour The ...” April 22, 2019 Jay@ManhattanReview posted a reply to If in the Problem Solving forum “We have (√x)^(1/3) = x/5 Applying cube of both the sides, we have D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses Princeton | ACT Prep Courses Dallas | New York IELTS Tutoring | and many more... Schedule your ...” April 22, 2019 Jay@ManhattanReview posted a reply to A citrus fruit grower receives$15 for each crate of oranges in the Data Sufficiency forum
“Say the number of crates of oranges shipped = x and the number of crates of grapefruit shipped = y. We have to get the value of x. 1) Last week the number of crates of oranges that the grower shipped was 20 more than twice the number of crates of grapefruit shipped. x = 20 + 2y ---(1) ...”
April 19, 2019
Jay@ManhattanReview posted a reply to In a group of 25 people, only three languages are spoken in the Data Sufficiency forum
“Say, the number of people who speak only English = E; the number of people who speak only German = G; the number of people who speak only Spanish = S; the number of people who speak only English & German but not Spanish = x; the number of people who speak only English & Spanish but ...”
April 19, 2019
Jay@ManhattanReview posted a reply to How many more men than women are in the room? in the Data Sufficiency forum
“Say the number of men = x and the number of women = y; We have to get the value of x – y. Let''s take each statement one by one. 1) There is a total of 20 women and men in the room. x + y = 20 ---(1) Can''t get x – y. Insufficient. 2) The number of men in the room equals the ...”
April 19, 2019
Jay@ManhattanReview posted a reply to A cyclist rode up and down a mountain along the same route in the Data Sufficiency forum
“Let''s take each statement one by one. 1) His uphill speed averaged 22 kilometers per hour, and his downhill speed averaged 48 kilometers per hour. Say the distance is 22*24 kms; I chose 22*24 kms so that the calculation becomes easy. Thus, time taken going up = (22*24) / (22) = 48 hours ...”
April 19, 2019
Jay@ManhattanReview posted a reply to A certain company currently has how many employees? in the Data Sufficiency forum
“Say currently the company has x employees. We have to determine the value of x. Let''s take each statement one by one. 1) If 3 additional employees are hired by the company and all of the present employees remain, there will be at least 20 employees in the company. => x + 3 ≥ 20 x ≥ ...”
April 19, 2019
Jay@ManhattanReview posted a reply to A comics bookstore has comics of only Superman, Batman and in the Data Sufficiency forum
“We have to determine what percent of all comics in the store is on Batman. Let''s take each statement one by one. 1) The ratio of the number comics of Flash, Batman, and Superman, in the library, is 2 : 7 : 5. Say the number comics of Flash, Batman, and Superman, in the library, is 2x, 7x ...”
April 18, 2019
Jay@ManhattanReview posted a reply to Each of three students is given fifteen tokens to spend at in the Data Sufficiency forum
“Say the number of tents Amelia visited that cost 3 tokens = x and the number of tents Amelia visited that cost 4 tokens = y; Thus, the total tokens spent by Amelia = 3x + 4y We know that each student has only 15 tokens; thus, 3x + 4y ≤ 15 We have to get the value of (x + y). Let''s ...”
April 18, 2019
Jay@ManhattanReview posted a reply to Last Thursday, John assembled chairs at a rate of 3 chairs in the Data Sufficiency forum
“Say John assembled chairs for j hours on Thursday; thus, Larry assembled chairs for (7 – j) hours on Friday. The total number of chairs assembled by the two = 3j + 4(7 – j). We have to get the value of 3j. Let''s take each statement one by one. (1) During these two days, John and ...”
April 18, 2019
Jay@ManhattanReview posted a reply to If sequence S has 120 terms, what is the 105th term of S? in the Data Sufficiency forum
“Let''s take each statement one by one. (1) The first term of S is −8. Certainly insufficient as we do not know by what pattern the subsequent terms follow. (2) Each term of S after the first term is 10 more than the preceding term. Certainly insufficient. Though we know the pattern the ...”
April 18, 2019
Jay@ManhattanReview posted a reply to Patricia builds two triangles, each with 30 feet of wood. in the Problem Solving forum
“So, we have two triangles with the perimeter 30 feet given that the sides of the triangles are integers. 1. Triangle-1 has the maximum possible base: The maximum possible base would be a little less than half the perimeter of the triangle. Thus, the maximum possible base < 1/2 of 30 (= ...”
April 16, 2019
Jay@ManhattanReview posted a reply to What is the remainder, after division by 100, of $$7^{10}$$? in the Problem Solving forum
“The remainder, after division by 100, of $$7^{10}$$ would be the last two digits. For example, 243 divided by 100 would leave a remainder 43. Let''s observe the units digits of 7^(positive integer) • 7^1 = 7; units digit = 7; • 7^2 = 49; units digit = 9; • 7^3 = 243; units digit = 3; ...”
April 16, 2019
Jay@ManhattanReview posted a reply to Danny has boxes colored either red or blue. In each blue box in the Problem Solving forum
“Say there are x number of blue boxes and each blue box contains y number of blueberries; similarly, there are a number of red boxes and each blue box contains b number of strawberries, Thus, the total number of blueberries = xy; and the total number of strawberries = ab total number of ...”
April 16, 2019
Jay@ManhattanReview posted a reply to If x and y are positive integers and x = 10y + 5, what is in the Problem Solving forum
“We have x = 10y + 5 => x = 5(2y + 1) We see that x is divisible by 5; thus, x divided by 5 will leave a remainder of 0. The correct answer: A Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | ...”
April 16, 2019
Jay@ManhattanReview posted a reply to When positive integer k is divided by 35, the remainder is in the Problem Solving forum
“Say when the positive integer k is divided by 35, the quotient is q and the remainder is 14. Then, we have k = 35q + 14 k = 7(5k + 2) We see that k must be a multiple of 7 or divisible by 7. The correct answer: B Hope this helps! -Jay The correct answer: Hope this helps! ...”
April 16, 2019
Jay@ManhattanReview posted a reply to The dots on the graph above indicate the weights and fuel in the Problem Solving forum
“Pl. see the below self-explanatory image. https://i.postimg.cc/fSn9GvX9/Graph.png The correct answer: B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Manhattan | GRE Prep Courses Boston | ACT Prep Courses San Francisco | Seattle IELTS Tutoring | ...”
April 15, 2019
Jay@ManhattanReview posted a reply to If positive integer 36y is divisible by 10, which of the in the Problem Solving forum
“Given that 36 is divisible by 10, we have y is divisible by 5. Let''s see each option one by one. I. y^2 is divisible by 25: Since y is divisible by 5, we have y^2 is divisible by 25. Correct II. y^2 is divisible by 100: From Statement I, we know that y^2 is divisible by 25, but we cannot ...”
April 15, 2019
Jay@ManhattanReview posted a reply to Seven cars of seven different models are going to park in a in the Problem Solving forum
“Since cars P and Q must be parked together, we can consider them as one. So, we have 6 cars instead of 7 cars. Six cars can be arranged in 6! = 720 ways. Since cars P and Q can be arranged as PQ or QP, the total number of ways = 2!*720 = 1440. Out of these 1440 ways, in half the number of ways, ...”
April 15, 2019
Jay@ManhattanReview posted a reply to In the figure above, line segment CZ = 6. What is the in the Data Sufficiency forum
“Let''s take each statement one by one. (1) Line segment XY = 4 You may observe that ∆XYZ ≈ ∆BAZ; thus, YX/YZ = BA/AZ => YX/YZ = BA/AZ => 4*AZ = BA*YZ---(1) You may also observe that ∆CZA ≈ ∆BAY; thus, CZ/YZ = BA/YA => CZ/YZ = BA/YA => 6*YA = BA*YZ ---(2) ...”
April 11, 2019
Jay@ManhattanReview posted a reply to Mary and Kate are running clockwise around a circular track in the Problem Solving forum
“Given that Mary runs 1000 meters every five minutes, Mary''s speed = 1000/5 = 200 meters per minute and that Kate runs 1000 meters every six minutes, Kate''s speed = 1000/6 = 500/3 meters per minute Since they are running clockwise (i.e., in the same direction), their relative speed = 200 – ...”
April 11, 2019
Jay@ManhattanReview posted a reply to What amount did Jean earn from the commission on her sales in the Data Sufficiency forum
“Let''s take each statement one by one. (1) In 1988 Jean''s commission was 5 percent of the total amount of her sales. Certainly insufficient. (2) The amount of Jean''s sales in the second half of 1988 averaged $10,000 per month more than in the first half. Certainly insufficient. (1) ...” April 11, 2019 Jay@ManhattanReview posted a reply to $$B$$ is a two-digit number, which can be expressed as the in the Data Sufficiency forum “So, we have B = ae. We have to find out the remainder when B = ae is divided by 12. Let''s take each statement one by one. 1) $$a$$ is an even number greater than 5. a is one among 6, 8, 10, 12, ... 98. These values would ensure that B is a 2-digit number. a = 98 is possible if e = 1. ...” April 10, 2019 Jay@ManhattanReview posted a reply to A circle is drawn within the interior of a rectangle. Does in the Data Sufficiency forum “Let''s take each statement one by one. 1) The rectangle’s length is more than twice its width. Note that if a circle is inscribed in a square and it touches the sides of the square, the area of the circle would be less than that of the square. Given that the rectangle’s length is more than ...” April 10, 2019 Jay@ManhattanReview posted a reply to Al and Barb shared the driving on a certain trip. What in the Data Sufficiency forum “Say the total distance of the trip is D miles and AL drove d miles out of D miles. We have to get the value of d/D. Let''s take each statement one by one. 1) Al drove for $$3/4$$ as much time as Barb did. No information about the distance. Note that we cannot assume that Aland Barb drove at ...” April 10, 2019 Jay@ManhattanReview posted a reply to Two positive integers $$a$$ and $$b$$ are divisible by $$5$$ in the Data Sufficiency forum “Given: GCD of (a, b) = 5 We have to determine the values of $$a$$ and $$b$$. Let''s take each statement one by one. 1) The lowest number that has both integers $$a$$ and $$b$$ as its factors is the product of one of the integers and the greatest common divisor of the two integers. The ...” April 10, 2019 Jay@ManhattanReview posted a reply to Beth's pizzeria offers x different toppings. What is the in the Data Sufficiency forum “Already replied: https://www.beatthegmat.com/beth-s-pizzeria-offers-x-different-toppings-what-is-the-t303478.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Geneva GMAT Prep | Free TOEFL Practice Questions | LSAT Prep Courses Toronto | SAT Prep Courses ...” April 10, 2019 Jay@ManhattanReview posted a reply to Is |n| < 1? in the Data Sufficiency forum “We have to determine whether |n| < 1. This means that we have to determine whether – 1 < n < 1. Let''s take each statement one by one. (1) n^x – n < 0 Case 1: Say n = 1/2, and x = 2. We see that n^x – n < 0 => (1/2)^2 – (1/2) < 0 => 1/4 – 1/2 < 0 => ...” April 9, 2019 Jay@ManhattanReview posted a reply to In triangle, ABC above, if AB = BC, find the value of y? in the Data Sufficiency forum “From the figure, we see that /_BAC = xº (vertically opposite angle) and /_BCA = (180 – z)º (complementary angle) Since AB = BC, the angles opposite to the side would also be equal. Thus, /_BAC = /_BCA x = 180 – z ---(1) We have to get the value of yº. In the ∆ABC, we have ...” April 9, 2019 Jay@ManhattanReview posted a reply to If m and n are consecutive positive integer, is m greater in the Data Sufficiency forum “Given that m and n are consecutive positive integers, there are two possibilities: 1. m > n and 2. n > m. We have to determine whether m > n. Let''s take each statement one by one. (1) m – 1 and n + 1 are consecutive positive integers. Case 1: Say m – 1 and n + 1 are ...” April 9, 2019 Jay@ManhattanReview posted a reply to Division R of Company Q has 1,000 employees. What is the in the Data Sufficiency forum “Say the number of employees at Company Q who are in Division R is R and their average salary is given by$r. the number of employees at Company Q who are not in Division R is X and their average salary is given by $x. Thus, The average (arithmetic mean) annual salary of the employees at ...” April 9, 2019 Jay@ManhattanReview posted a reply to If # denotes one of the four arithmetic operations addition in the Data Sufficiency forum “Let''s take each statement one by one. (1) n # 0 = n for all integers n • # as addition We see that n # 0 = n + 0 = n; So, 1 # 2 = 1 + 2 = 3. • # as subtraction We see that n # 0 = n – 0 = n; So, 1 # 2 = 1 – 2 = –1. No unique value of 1 # 2. Insufficient. (2) n ...” April 9, 2019 Jay@ManhattanReview posted a reply to At a certain university, the ratio of undergraduate students in the Problem Solving forum “Say there are D numbers of undergraduate students with an associate’s degree and N numbers of undergraduate students without an associate’s degree; thus, we have D/N = 1/3 => (D + N)/N = 4/3, where (D + N) = Total number of graduates Again, say there are G numbers of graduate students ...” April 8, 2019 Jay@ManhattanReview posted a reply to A bus completed first 50 miles of a 120-mile trip at an in the Problem Solving forum “Time taken to complete first 50 miles of a 120-mile trip at an average speed of 20 mph = 50/20 = 2.5 hours; Time taken for halt = 30 minutes = 0.5 hours; Time taken to complete the half of the remaining journey E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep ...” April 8, 2019 Jay@ManhattanReview posted a reply to In a sequence of 12 numbers, each term, except for the first in the Problem Solving forum “Since each subsequent term is less than the previous term, the greatest term in the sequence would be the first term = $$12^{12}$$. Thus, • II term = I term – $$12^{11}$$ = $$12^{12}$$ – $$12^{11}$$; • III term = $$12^{12}$$ – 2*$$12^{11}$$; • II term = $$12^{12}$$ – ...” April 8, 2019 Jay@ManhattanReview posted a reply to In the figure above, the perimeter of ∆MNP is how much in the Problem Solving forum “We see ∆MNP is an isosceles rightangled triangle; thus, MN is the hypotenuse of the triangle. Length of MN = 8√2 Perimeter of ∆MNP = 8√2 + 8 + 8 = 8(2 + √2) meters Similarly, the shaded triangle is also an isosceles rightangled triangle; thus, its hypotenuse = 5√2 Perimeter of ...” April 8, 2019 Jay@ManhattanReview posted a reply to The figure below represents a track with identical in the Problem Solving forum “From the table, we see that Team B finished after 185 – 178 = 7 seconds of Team A. Thus, of the 42 seconds, the 4th runner ran for 42 – 7 = 35 seconds when Team A finished. Thus, Team B lost by the distance that the 4th runner completed in 7 seconds. From the track figure, we know that the ...” April 8, 2019 Jay@ManhattanReview posted a reply to If x is positive, what is the value of y ? in the Data Sufficiency forum “Let''s take each statement one by one. (1) 5x = 15 => x = 3. We don''t have any information about y. Insufficient. (2) xy + y = 18 => y(1 + x ) = 18 Many possible values of y, keeping x positive. Insufficient. (1) and (2) Plugging in x = 3 in y (1 + x ) = 18, we get y(1 ...” April 5, 2019 Jay@ManhattanReview posted a reply to A clothing store acquired an item at a cost of x dollars and in the Data Sufficiency forum “Percentage of gross profit = (Profit/cost)*100% = B Hope this helps! -Jay _________________ Manhattan Review GRE Prep Locations: Manhattan GMAT | Free LSAT Practice Questions | LSAT Prep Courses Manchester | SAT Prep Courses Hong Kong | and many more... Schedule your free consultation ...” April 5, 2019 Jay@ManhattanReview posted a reply to A company uses 2 machines to fill an order for 3,360 bottle in the Problem Solving forum “Given that Machine A can produce 72 bottle caps every 24 minutes, and it can run for 4 hours, it will produce 72/24 * 60 * 4 = 720 caps in 4 hours and that Machine B can produce 48 bottle caps every 12 minutes, and it can run for 4 hours, it will produce 48/12 * 60 * 4 = 960 caps in 4 hours. ...” April 5, 2019 Jay@ManhattanReview posted a reply to A company uses 2 machines to fill an order for 3,360 bottle in the Problem Solving forum “Given that Machine A can produce 72 bottle caps every 24 minutes, and it can run for 4 hours, it will produce 72/24 * 60 * 4 = 720 caps in 4 hours and that Machine B can produce 48 bottle caps every 12 minutes, and it can run for 4 hours, it will produce 48/12 * 60 * 4 = 960 caps in 4 hours. ...” April 5, 2019 Jay@ManhattanReview posted a reply to It takes Amy between 6 and 7 minutes to grill a steak, and in the Data Sufficiency forum “Let''s take each statement one by one. (1) Amy needs to grill four steaks for her party. => She will take 6*4 = 24 to 7*4 = 28 minutes to grill. However, we do not know what time her guests would arrive. Insufficient. (2) Amy''s guests will arrive in half an hour. We do not know how ...” April 4, 2019 Jay@ManhattanReview posted a reply to On the number line above, p, q, r, s, and t are five in the Data Sufficiency forum “Since p, q, r, s, and t are five consecutive even integers, the average (arithmetic mean) of these five integers would be r. we have q = p + 2; r = p + 4; s = p + 6; t = p + 8 So, we have to get the value of p +4. Let''s take each statement one by one. (1) q + s =24 p + 2 + p ...” April 4, 2019 Jay@ManhattanReview posted a reply to If x, y, and d are integers and d is odd, are both x and y in the Data Sufficiency forum “Given: x, y, and d are integers and d is odd We have to find out whether x, y, and d are integers and d is odd. Let''s take each statement one by one. 1) x + y is divisible by d. Case 1: Say x = 5, y = 1 and d =3 x + y = 5 + 1 = 6; we see that 6 is divisible 3, but neither x nor y is ...” April 4, 2019 Jay@ManhattanReview posted a reply to A mixture of "lean" ground beef (10% fat) and &quo in the Problem Solving forum “Say the quantity of "lean" ground beef = x units and the quantity of "super-lean" ground beef = y units; thus, we have to get the value of x : y. 10%x + 3%y = 8%*(x + y) 2%x = 5%y x/y = 5 : 2 The correct answer: A Hope this helps! -Jay _________________ ...” April 4, 2019 Jay@ManhattanReview posted a reply to The cost to park a car in a certain parking garage is$8.00 in the Problem Solving forum
“Total parking charges for 9 hours = 8 + 1.75*(9 – 2) = 8 + 1.75*7 = $20.25 Thus, average (arithmetic mean) cost per hour to park a car in the parking garage for 9 hours =$20.25/9 = $2.25 The correct answer: C Hope this helps! -Jay _________________ Manhattan Review LSAT Prep ...” April 4, 2019 Jay@ManhattanReview posted a reply to 1/2+(2/3*3/8)/4-9/16=? in the Problem Solving forum “We have $$\frac{1}{2}+\frac{\frac{2}{3}\cdot\frac{3}{8}}{4}-\frac{9}{16}$$ $$\frac{1}{2}+\frac{1}{16}-\frac{9}{16}$$ $$\frac{8}{16}+\frac{1}{16}-\frac{9}{16}$$ = 0 The correct answer: E Hope this helps! -Jay _________________ Manhattan Review SAT Prep Locations: Manhattan GMAT | ...” April 3, 2019 Jay@ManhattanReview posted a reply to If $$m$$ is the square of integer $$n$$ and $$m$$ is in the Problem Solving forum “Let''s factorize 98. 98 = 2*7^2. Since m is a perfect square, it must be divisible by even powers of prime factors 2 and 7. Thus, m must be divisible by 2^2*7^2 = 196; thus m must be divisible by all the factors of 196, i.e., 1, 2, 4, 7, 14, 28, 49, 98 and 196. The correct answer: C Hope this ...” April 3, 2019 Jay@ManhattanReview posted a reply to Of the 100 athletes at a soccer club, 40 play defense and 70 in the Problem Solving forum “Given that there are 100 athletes at a soccer club, and at least 20 of the athletes play neither midfield nor defense, we have less than 80 athletes who play either midfield or defense or both. Thus, 80 > 40 + 70 – both Thus, both > 30 Since the value of both cannot be greater than ...” April 3, 2019 Jay@ManhattanReview posted a reply to Of 200 people surveyed, 80 percent own a cellular phone and in the Problem Solving forum “Total number of people who own either phone or pager = Total number of people who own phone + Total number of people who own pager – Total number of people who own both phone and pager Taking percent values... 100% = 80% + 45% – Both Both = 25% Percent of those surveyed either do not ...” April 3, 2019 Jay@ManhattanReview posted a reply to The integer 6 is the product of two consecutive integers (6 in the Problem Solving forum “This question can better be solved through hit and trial. We see that 210 can be written as 2*3*5*7; though looking at this, we do not see that there is a possibility of finding 210 as the product of two consecutive integers and the product of three consecutive integers, upon a close look, we can ...” April 3, 2019 Jay@ManhattanReview posted a reply to At a certain high school, the junior class is twice the size in the Problem Solving forum “Say, the number of students in the senior class = S; thus, the number of students in the junior class = 2S; thus, the total number of students = S = 2S = 3S Number of seniors who study Japanese = S/3; Number of seniors who do not study Japanese = S – S/3 = 2S/3; Number of juniors who study ...” April 3, 2019 Jay@ManhattanReview posted a reply to A certain packing box contains books between 50 to 60. in the Data Sufficiency forum “Let''s take each statement one by one. (1) If the books are counted by three, there will be one book left over. The number of books can be 52, 55, or 58. No unique answer. (2) If the books are counted by six, there will be one book left over. The only number between 50 and 60 such that ...” April 3, 2019 Jay@ManhattanReview posted a reply to Linda put an amount of money into each of two new investment in the Data Sufficiency forum “Say, the annual interest rate of investment A = r and the annual interest rate of investment A = R; the amount of money invested in investment A =$A and the amount of money invested in investment B = $B Thus, we have R = 1.5r We have to get the value of A. Let''s take each statement one by ...” April 3, 2019 Jay@ManhattanReview posted a reply to Is x > 0? in the Data Sufficiency forum “Let''s take each statement one by one. (1) x^6 > x^7 => 1 > x; cancelling x^6 from both the sides. Since the exponent of x^6 is 6, an even number, the value of x^6 must be positive, irrespective of x is negative or positive, making us need not worry about the change in sign of the ...” April 2, 2019 Jay@ManhattanReview posted a reply to In the circle above, chords AC and BD intersect at point P. in the Data Sufficiency forum “Since AP and BD are two chords that intersect, we have AP*PC = BP*PD => PC/PD = BP/AP 5/3 = BP/AP BP = 5*AP/3 If we get the value of AP, we get the value of BP. Let''s take each statement one by one. (1) AP = 10. Sufficient. (2) Angle BPC measures 90 degrees. Certainly ...” April 2, 2019 Jay@ManhattanReview posted a reply to If x is an integer, is |x| > 1? in the Data Sufficiency forum “Let''s understand |x| > 1. For |x| > 1 to be true, x can be any integer other than –1, 0 and 1. So, the question is whether x is one among –1, 0 and 1. Let''s take each statement one by one. (1) (1 - 2x)(1 + x) < 0 Case 1: Say x = 1 At x = 1, we have (1 - 2x)(1 + x) < ...” April 2, 2019 Jay@ManhattanReview posted a reply to For what percent of those tested for a certain infection was in the Data Sufficiency forum “Pl. refer to the image below. https://i.postimg.cc/McxrjVb7/Accurate.png The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GRE Prep Locations: Manhattan GMAT | GMAT Prep Courses Riyadh | LSAT Prep Courses Orlando | Manhattan Prep SAT Courses | and many ...” April 2, 2019 Jay@ManhattanReview posted a reply to The largest bonus that Felix can receive this year is equal in the Data Sufficiency forum “Say Felix''s annual salary is$I. Thus, The largest bonus = 20% of I = I/5; The Smallest bonus = 30% of I/5 = 3I/50 We have to get the value of I. Let''s take each statement one by one. 1. The smallest possible bonus that Felix can receive this year is $4800.00. => 3I/50 = ...” April 1, 2019 Jay@ManhattanReview posted a reply to Mike bought a computer system for$4,000 and later sold it. in the Data Sufficiency forum
“We have cost price = $4,000. We have to get the value of Selling price. Let''s take each statement one by one. 1) Mike sold the computer system for 60% of the price he paid for it. => Selling price = 60% of 4,000 =$2,400. Sufficient. 2) Mike advertised the computer system in a ...”
April 1, 2019
Jay@ManhattanReview posted a reply to In the figure shown, triangle ABC is inscribed in the circle in the Data Sufficiency forum
“Let''s take each statement one by one. (1) AB is a diameter of the circle. We do not know the measure of AB, thus, we can''t get the value of circumference of the circle. Insufficient. (2) The ratio of the lengths of BC, AC, and AB, respectively, is 3 : 4 : 5. Certainly insufficient. ...”
April 1, 2019
Jay@ManhattanReview posted a reply to If √k is not an integer, then is k a prime number? in the Data Sufficiency forum
“Let''s take each statement one by one. (1) k < 10 Case 1: Say k = 8, not prime We have √k = √8 = not an integer Case 2: Say k = 7, prime We have √k = √7 = not an integer No unique answer. Insufficient. (2) k < 5 Case 1: Say k = 4,5, not prime (note that it is ...”
March 29, 2019
Jay@ManhattanReview posted a reply to Alice bought a certain number of 30 cent stamps, 35 cent in the Data Sufficiency forum
“Let the number of 30 cent stamps, 35 cent stamps and 40 cent stamps be x, y and z, respectively. Thus, we have 30x + 35y + 40z = 420 6x + 7y + 8z = 84 We have to determine where at least one of x, y and z is greater than 5. Let''s take each statement one by one. (1) The number of 35 ...”
March 29, 2019
Jay@ManhattanReview posted a reply to If $$n$$ is a positive integer and $$r$$ is the remainder in the Data Sufficiency forum
“Let''s take each statement one by one. 1) $$n$$ is not divisible by $$2$$. Case 1: Say n = 1 $$(n-1)(n+1)$$ = 0. We see that 0 divided by 24 leaves a remainder 0. Thus, r = 0. Case 1: Say n = 3 $$(n-1)(n+1)$$ = 2*4 = 8. We see that 8 divided by 24 leaves a remainder 8. Thus, r = 8. ...”
March 29, 2019
Jay@ManhattanReview posted a reply to Seventy percent of the 800 students in School T are male. At in the Problem Solving forum
“Number of male students = 70% of 800 = 560; Thus, the number of female students = 30% of 800 = 240; Minimum number of female students who participate in a sport = 10% of 240 = 24; Thus, the maximum number of female students who do not participate in a sport = 240 – 24 = 216; Maximum number ...”
March 29, 2019
Jay@ManhattanReview posted a reply to In 1982 and 1983, Company B's operating expenses were $12.0 in the Problem Solving forum “Company B’s profit in 1982 = 15.6 – 12 =$3.6 M; Company B’s profit in 1983 = 18.8 – 14 = $4.8 M Percent increase in Company B’s profit from 1982 to 1983 = D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan GMAT Classes | GMAT Prep ...” March 29, 2019 Jay@ManhattanReview posted a reply to Two fair die with sides numbered 1 to 6 are tossed. What is in the Problem Solving forum “With two dies, we have 6*6 = 36 ways of getting a sum of 2 to 12. The prime numbers between 2 to 12 are 2, 3, 5, 7, and 11. Number of ways of getting the sum, a prime number, is listed as (1) Sum = 2: Ways: (1, 1): Total number of ways = 1; (2) Sum = 3: Ways: (1, 2); (2, 1): Total number of ...” March 29, 2019 Jay@ManhattanReview posted a reply to Function in the Problem Solving forum “Hello rawat2583, What''s the source of the question. It does not seem to be a GMAT question. Pl. post GMAT questions from genuine sources. :) -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Manhattan | GMAT Prep Courses New Delhi | LSAT Prep Courses Hong Kong | ...” March 28, 2019 Jay@ManhattanReview posted a reply to A certain portfolio consisted of 5 stocks, priced at$20, $3 in the Problem Solving forum “The price of five stocks before change =$(20 + 35 + 40 + 45 + 70) = $210; The change in the price of five stocks = ~$210*2% = ~$4.2 So, we have to find the two options such that when the price of one of them increases by 15% and the price of the other decreases by 35%, the net result should be ...” March 27, 2019 Jay@ManhattanReview posted a reply to A straight highway connects two cities P and Q, and goes via in the Data Sufficiency forum “See the diagram depicting the highway. P -------30 mph---------M -------50 mph--------- N --------60 mph---------- Q Let''s take each statement one by one. Statement 1: The ratio of time the bus took to cover the distances PM, MN, and NQ respectively is 2:1:3. Say, the time the bus took ...” March 27, 2019 Jay@ManhattanReview posted a reply to When 1,000 children were inoculated with a certain vaccine, in the Data Sufficiency forum “Let''s take each statement one by one. Say, I = Number of children that developed inflammation but not fever; F = Number of children that developed fever but not inflammation; B = Number of children that developed both fever and inflammation N = Number of children that developed neither ...” March 27, 2019 Jay@ManhattanReview posted a reply to The figure shown is a regular hexagon with center h. in the Problem Solving forum “Since it is given that the hexagon is a regular hexagon, the unshaded region can be divided into 4 equal equilateral triangles. Area of an equilateral triangle = √3/4a^2; where a = side of the equilateral triangle => Area of the unshaded region = Area of 4 equilateral triangles = ...” March 26, 2019 Jay@ManhattanReview posted a reply to W, X, Y, and Z represent distinct digits such that WX*YZ= in the Data Sufficiency forum “Given: 1. $$W, X, Y$$, and $$Z$$ represent distinct digits 2. $$WX*YZ=1995$$. We have to get the value of W. Since the units digit of 1995 is 5, the units digit of the product of X*Z must also be 5; thus, there are three possibilities: 1. X = 1 and Z = 5; 2. X = 5 and Z = 1; 3. X = 5 and ...” March 25, 2019 Jay@ManhattanReview posted a reply to Jack and Mark both received hourly wage increases of 6%. in the Data Sufficiency forum “Say Mark''s wages before the increase = M and Jack''s wages before the increase = J; Thus, after the increases, Mark''s wages before the increase = 1.06M; Jack''s wages before the increase = 1.06J Thus, Jack''s hourly wage was 1.06(J – M) dollars per hour more than Mark''s. We have to ...” March 25, 2019 Jay@ManhattanReview posted a reply to A positive integer n has the smallest 3 prime numbers as its in the Data Sufficiency forum “The smallest 3 prime numbers are 2, 3 and 5. Say n = 2^a * 3^b * 5^c, where a, b and c are positive integers The number of factors of n are (a + 1) * (b + 1) * (c + 1). We have to get the value of (a + 1) * (b + 1) * (c + 1). Let''s take each statement one by one. 1) The total number ...” March 25, 2019 Jay@ManhattanReview posted a reply to An insurance company has a contract with a medical in the Data Sufficiency forum “Let''s take each statement one by one. 1) The insurance company is required to pay only 20 percent of the original bill for the test. Since the company pays 20% of the bill, the discount percent = 80%. Sufficient. 2) The insurance company is required to pay$46 for the test. Percent ...”
March 18, 2019
Jay@ManhattanReview posted a reply to At a graduation ceremony, some students earned bachelors in in the Data Sufficiency forum
“Say, The number of students who earned bachelors degree only in science = s; The number of students who earned bachelors degree only in arts a; The number of students who earned bachelors degree only in science and art both = b Thus, we have s + b + a = 200. We have to get the value of s ...”
March 18, 2019
Jay@ManhattanReview posted a reply to In the figure above, if x and y are each less than 90 and PS in the Data Sufficiency forum
“This can be solved with little imagination. Let''s take each statement one by one. 1) $$x > y$$ => $$90 > x > y$$ Imagine x = 75 and y = 30; you would observe that PQ << SR. Even if x and y are close to each other, ensuring that x > y, we have PQ < SR. The answer ...”
March 18, 2019
Jay@ManhattanReview posted a reply to In the given figure $$BD=6$$ and $$DC=4$$. If angle $$BAD$$ in the Problem Solving forum
“Given /_ADC = 120, we have /_ADB = 180 – 120 = 60. Again, given /_BAD = 30 and /_ADB = 60, we have /_ABD = 90. Thus, ∆ABD is a 30-60-90 rightangled triangle. For the 30-60-90 the rightangled triangle ∆ABD, given that BD = 6, we have AB = 6√3 Thus, area of ∆ADC = 1/2 * AB * DC = ...”
March 15, 2019
Jay@ManhattanReview posted a reply to The number $$A$$ can be expressed as $$p*q$$ where $$p$$ and in the Data Sufficiency forum
“We have A = pq. We need to determine whether A is divisible by 16; for it to happen pq must be divisible by 16. Let''s take each statement one by one. 1. $$p=8*k$$, where $$k$$ is an odd number. pq = 8kq If q is even, the answer is yes; however, if q is odd, the answer is no. ...”
March 15, 2019
Jay@ManhattanReview posted a reply to Ashley and Vinnie work on a sales staff with 8 other in the Problem Solving forum
“Including Ashley and Vinnie, there are 10 salespeople. Number of ways of choosing ANY 5 members out of 10 = 10C5; Number of ways of choosing 5 members out of 10 such that 2 of them are Ashley and Vinnie = 2C2 * 8C3 = 8C3; Probability that both Ashley and Vinnie will be chosen = 8C3 / 10C5 = ...”
March 14, 2019
Jay@ManhattanReview posted a reply to On Tuesday, Kramer purchases exactly 3 new shirts, 2 new swe in the Problem Solving forum
“So, Kramer will start wearing outfits, starting Wednesday and this will go on. We have to find out the day when it is not possible for him to wear a new combination of shirt, sweater, and hat. He has exactly 3 new shirts, 2 new sweaters, and 4 new hats; thus, the total number of combinations ...”
March 14, 2019
Jay@ManhattanReview posted a reply to Working at their respective constant rates, Paul, Abdul and in the Problem Solving forum
“Work done by Paul, Abdul, and Adam alone in one hour = 1/3, 1/4 and 1/5, respectively. Work done by Paul, Abdul, and Adam together in one hour = 1/3 + 1/4 + 1/5 = 47/60 Fraction of the work will be done by Adam = Part of the work done by Adam / Part of the work done by Adam Paul, Abdul, and ...”
March 14, 2019
Jay@ManhattanReview posted a reply to Peter and Tom shared the driving on a certain trip. If Peter in the Problem Solving forum
“Given that Peter only drove 2/5 of the total distance, Tom must drove 1 – 2/5 = 3/5 of the total distance. Since time is same, the ratio of Peter''s average speed to Tom''s average speed = Ratio of their distances = (2/5) : (3/5) = 2 : 3 The correct answer: E Hope this helps! -Jay ...”
March 13, 2019
Jay@ManhattanReview posted a reply to A basketball team’s current roster consists of g guards an in the Problem Solving forum
“The number of guards now = g + 2 and the number of forwards now = f – 1 Total number of players = g + 2 + f – 1 = g + f +1 The probability that a player chosen at random is a guard = number of guards / total number of players = (g + 2) / (g + f +1) The correct answer: D Hope this ...”
March 13, 2019
Jay@ManhattanReview posted a reply to If when x is divided by z, the result is y remainder q, then in the Problem Solving forum
“Let''s take this question as: when 13 is divided by 3, the result is 4 and the remainder is 1. Thus, 13 = 3*4 + 1 Coming to the question: x = yz + q There is no option as x = yz + q. Dividing by z, we get x/z = y + q/z => x/z – y = q/z The correct answer: B Hope this helps! ...”
March 13, 2019
Jay@ManhattanReview posted a reply to In each of the last five years, Company K donated p percent in the Data Sufficiency forum
“Let''s take each statement one by one. We have to determine whether p% of last year''s annual profit > 100,000. (1) Two years ago, Company K had annual profits of $3 million and donated$15,000 to the scholarship fund. Certainly insufficient since the data is for the last year. ...”
March 12, 2019
Jay@ManhattanReview posted a reply to If 3x + 12 = 21, then x + 4 = in the Problem Solving forum
“We have 3x + 12 = 21 Takin 3 as common, we have 3(x + 4) = 21 => x + 4 = 21/3 = 7. The correct answer: D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes London | GMAT Prep Courses Shanghai | LSAT Prep Courses Boston | SAT Prep Classes ...”
March 11, 2019
Jay@ManhattanReview posted a reply to Carmen currently works 30 hours per week at her part-time jo in the Data Sufficiency forum
“Say Carmen currently earns $x per hour; thus, she earns$30x per week. Now her per hour wage increased to $(x + 1.50). Thus, to earn the same gross weekly wages, she must work 30x / (x + 1.50) hours. We have to get the value of x. Let''s take each statement one by one. (1) Her gross weekly ...” March 11, 2019 Jay@ManhattanReview posted a reply to A farmer who grows strawberries defines a "workday yiel in the Data Sufficiency forum “The volume of the entire expected crop of strawberries = Workday yield * Number of calendar days * Number of workers Let''s take each statement one by one. (1) A workday yield is 45 liters. We do not know ''the volume of the entire expected crop of strawberries,'' can''t get the value of ...” March 11, 2019 Jay@ManhattanReview posted a reply to What is the LCM of the numbers 3, a, and 7, if ‘a’ is an in the Data Sufficiency forum “Let''s take each statement one by one. Statement 1. ‘a’ is a prime number greater than 2. Case 1: Say a = 3, then the LCM of the numbers 3, a = 3, and 7 = 21. Case 2: Say a = 5, then the LCM of the numbers 3, a = 5, and 7 = 105. No unique answer. Insufficient. Statement 2. Both GCD ...” March 11, 2019 Jay@ManhattanReview posted a reply to At a particular moment, a restaurant has x biscuits and y pa in the Data Sufficiency forum “So, in a nutshell, we have to find out the possible values of x/y such that x/y is an integer, x > 2 and y > 1. Let''s take each statement one by one. (1) x = a^2*b^3, where a and b are different prime numbers Given that x = a^2*b^3, the number of factors of x are (2 + 1)*(3 + 1) = ...” March 7, 2019 Jay@ManhattanReview posted a reply to Of the 12 temporary employees in a certain company, 4 will in the Problem Solving forum “So, there are 5 women and 7 men; out of 5 women, 3 are to be chosen and out of 7 men, 1 is to be chosen. # of possible groups of 4 employees consist of 3 women and one man = 5C3 * 7C1 = (D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Vienna ...” March 7, 2019 Jay@ManhattanReview posted a reply to A right circular cylinder with a radius of 2 feet and a leng in the Problem Solving forum “Given that the height of the cylinder is 6, the height of each of the three pieces = 6/3 = 2 feet Thus, the volume of each of the three pieces = πr^2*h = π*2^2*2 = 8π feet^3 The correct answer: C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT ...” March 7, 2019 Jay@ManhattanReview posted a reply to To install cable television in a home, a certain cable compa in the Data Sufficiency forum “Say the Horace family for installed x numbers of cable television in their home. Thus, we have the company would charge them =$(30 + 20x) We have to determine the value of $(30 + 20x). Let''s take each statement one by one. (1) The cable company installed three cable outlets in the ...” March 6, 2019 Jay@ManhattanReview posted a reply to If Carmen had 12 more tapes, she would have twice as many in the Data Sufficiency forum “Say Carmen has C number of tapes and Rafael has R number of tapes. Thus, from the given condition, we have C + 12 = 2R We have to determine whether C < R. Let''s take each statement one by one. (1) Rafael has more than 5 tapes. Case 1: Say R = 6 (Minimum possible value of R) ...” March 6, 2019 Jay@ManhattanReview posted a reply to Each of the items in a box is either a ball or a cube and ea in the Problem Solving forum “Given that 72% of the items are cubes, we have % of blue cubes + % of red cubes = 72% => 54% + % of red cubes = 72% => % of red cubes = 72% – 54% = 18% The correct answer: A Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes ...” March 6, 2019 Jay@ManhattanReview posted a reply to Geoff is setting up an aquarium and must choose 4 of 6 in the Problem Solving forum “Number of ways of choosing different fish out of 6 = 6C4 = 6C2 = 6.5 / 1.2 = 15; Number of ways of choosing 2 different plants out of 3 = 3C2 = 3C1 = 3 Total number of ways of setting up an aquarium = 15*3 = 45 The correct answer: D Hope this helps! -Jay _________________ Manhattan ...” March 6, 2019 Jay@ManhattanReview posted a reply to x is the product of all even numbers from 2 to 50, inclusive in the Problem Solving forum “We have x = 2.4.6.8.....48.50 = (2.1).(2.2).(2.3).........(2.24).(2.25 ) = 2^(25)*(1.2.3........25) = 2^(25)∗25! You may note that 2^(25)∗25! is divisible by all the prime numbers less than 25. Again, note that two consecutive integers are co-prime to each other, i.e., they don''t share ...” March 5, 2019 Jay@ManhattanReview posted a reply to Consider the following sets: L = {3, 4, 5, 5, 6, 7} M = {2, in the Problem Solving forum “The standard deviation measures the spread of the data w.r.t. its mean value. It is applied in comparing sets of data which may have the same mean but a different range. For example, the mean of the following two is the same: 15, 15, 15, 14, 16 and 2, 7, 14, 22, 30. However, the second is clearly ...” March 4, 2019 Jay@ManhattanReview posted a reply to In the correctly-worked multiplication problem above, each s in the Data Sufficiency forum “We can do the prime factorization of 1995. 1995 = 5*3*7*19. A possible combination of numbers could be 5*3 = 15 and 7*19 = 133 (Not possible since 133 is not a 2-digit number). Another possible combination could be 5*7 = 35 and 3*19 = 57. This is also not possible since in 35 and 57, digit ...” March 4, 2019 Jay@ManhattanReview posted a reply to The next number in a certain sequence is defined by multiply in the Data Sufficiency forum “Let''s take each statement one by one. (1) The ninth term in this sequence is 81. Case 1: Say k = 3, then the first nine terms are 1/81, 1/27, 1/9, 1/3, 1, 3, 9, 27, and 81. The terms greater than 1 are 3, 9, 27, and 81. The answer is 4. Case 2: Say k = 9, then the first nine terms are ...” March 4, 2019 Jay@ManhattanReview posted a reply to Seven different numbers are selected from the integers 1 to in the Data Sufficiency forum “Let''s take each statement one by one. (1) The range of the seven remainders is 6. Case 1: Say the seven different numbers are 3, 4, 5, 6, 7, 8, and 9. Reminders of above numbers, when divided by 7, are 3, 4. 5, 6, 0, 1, and 2. We see that the range of the seven remainders = 6 – 0 = 6. ...” March 4, 2019 Jay@ManhattanReview posted a reply to In June 1989, what was the ratio of the number of sales tran in the Data Sufficiency forum “Say, in June 1989, the number of sales transactions made by Salesperson X = x and the number of sales transactions made by Salesperson Y = y. We have to get the value of x /y. Let''s take each statement one by one. (1) In June 1989, Salesperson X made 50 percent more sales ...” March 1, 2019 Jay@ManhattanReview posted a reply to Is the standard deviation of Set A greater than or equal to in the Data Sufficiency forum “The standard deviation measures the spread of the data w.r.t. its mean value. It is applied in comparing sets of data which may have the same mean but a different range. For example, the mean of the following two is the same: 15, 15, 15, 14, 16 and 2, 7, 14, 22, 30. However, the second is clearly ...” March 1, 2019 Jay@ManhattanReview posted a reply to One gram of a certain health food contains 7 percent of the in the Problem Solving forum “Since between vitamin E and vitamin A, the supply of vit A (3%) is less than vit E (7%), we must focus on the minimum requirement of vit A; since if the quantity of vit A is taken are, the quantity of vit E would also be taken care of. Given one gram of a certain health food contains 3 percent of ...” February 27, 2019 Jay@ManhattanReview posted a reply to Dan and Alex measure themselves against a tree in their in the Problem Solving forum “Say the height of Dan is 100 ft, thus, the height of the tree = 180 feet => Height of Alex = Height of the tree / (120%) = 180 / 120% = 150 feet Thus, Alex is taller than Dan by 150 – 100 = 50%. The correct answer: E Hope this helps! -Jay _________________ Manhattan Review ...” February 27, 2019 Jay@ManhattanReview posted a reply to Working alone, pump A can empty a pool in 3 hours. Working a in the Problem Solving forum “Work done by pump A and B together in 1 hour = 1/3 + 1/2 = 5/6 part of the pool Thus, it takes 1 / (5/6) = 6/5 hours or (6/5)*60 = 72 minutes to empty the pool The correct answer: A Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes in ...” February 27, 2019 Jay@ManhattanReview posted a reply to In the xy-coordinate system, rectangle ABCD is inscribed in the Problem Solving forum “Since the equation of the circle is x^2 + y^2 = 25, its radius is √25 = 5 and the diameter is 2*5 = 10. Since vertex B lies on the x^2 + y^2 = 25 as well as on y = 3x + 15, the x and y coordinates of vertex B would satisfy both the equations. Plugging-in y = 3x + 15 in x^2 + y^2 = 25, we get ...” February 27, 2019 Jay@ManhattanReview posted a reply to What is the cube root of w? in the Data Sufficiency forum “Let''s take each statement one by one. (1) The 5th root of w is 64. => w^(1/5) = 64 w = (64)^5 => w^(1/3) = (64)^5 = D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes in Manhattan | GMAT Tutoring New York | GRE Prep Seattle | ...” February 27, 2019 Jay@ManhattanReview posted a reply to 4 friends A, B, C, and D appeared in a certain examination. in the Problem Solving forum “As per the given information, b = a – 33.33% of a => b = 2a/3; b = c – 50% of c = c/2 => c = 4a/3 d ≥ 2.5b = 2.5*(2a/3) d ≥ 5a/3 a + c = a + 4a/3 = 7a/3 The maximum percentage by which the combined score of A and C is more than the score of D = C Hope this helps! ...” February 26, 2019 Jay@ManhattanReview posted a reply to If P is the center of the circle shown above, and BAC = 30º in the Problem Solving forum “Area of the circle = πr^2, where r = AC/2 If we get the value of AC, we get the answer. Note that since AC is a diameter, it subtends 90º on the circumference of the circle. Thus, triangle ABC is a rightangled triangle of 30-60-90 type. A rightangled triangle of 30-60-90 type has its sides ...” February 26, 2019 Jay@ManhattanReview posted a reply to Working continuously 24 hours a day, a factory bottles Soda in the Problem Solving forum “Since the question asks for the ratio and not the actual answer, we need not take 24 hours per day into consideration. Ratio of Rate of filling Soda Q : Rate of filling Soda V :: 500 : 300 => 5 : 3. Ratio of number of bottles of Soda Q : number of bottles of Soda V :: 2 : 1 Thus, ...” February 26, 2019 Jay@ManhattanReview posted a reply to How many miles long is the route from Houghton to Callahan? in the Data Sufficiency forum “Say the distance from Houghton to Callahan is D miles. Let''s take each statement one by one. (1) It will take 1 hour less time to travel the entire route at an average rate of 55 miles per hour than at an average rate of 50 miles per hour. => D/50 – D/55 = 1 D = 5500 miles. ...” February 25, 2019 Jay@ManhattanReview posted a reply to All assets in Karina's investment portfolio are divided betw in the Problem Solving forum “Say the four accounts are A, B, C and D. We know that the percentage values of investments are positive integers. Say the largest percentage values of the investments is for D; thus, with A, B and C being the minimum and distinct, A = 1%, B = 2% and C = 3%; thus D = 100 – 1 – 2 – 3 = 94%. ...” February 25, 2019 Jay@ManhattanReview posted a reply to Vivian drives to her sister’s house and back. She takes th in the Problem Solving forum “Say the one-way distance is 350 miles. I chose 350 since 350 is the LCM of 50 and 70. Time taken for the out trip = Distance / Speed = 350 / 50 = 7 hours; Time taken for the out trip = Distance / Speed = 350 / 70 = 5 hours Aerage speed = Total distance / Total time = (2*350) / (7 + 5) = 58.33 ...” February 25, 2019 Jay@ManhattanReview posted a reply to Of the 80 house in a development, 50 have a two-car garage, in the Problem Solving forum “Number of houses with a two-car garage = 50; Number of houses with in-the-ground swimming pool = 40; Number of houses with both a two-car garage and in-the-ground swimming pool = 35; Thus, the number of houses with a two-car garage or in-the-ground swimming pool = 50 + 40 – 35 = 55 Thus, ...” February 22, 2019 Jay@ManhattanReview posted a reply to Given that p is a positive even integer with a positive unit in the Problem Solving forum “Given that p is a positive even integer with a positive units digit, the units digit of p can be 2, 4, 6, or 8. Let''s try for these possible values of p. 1. Say p = 2; p^3 – p^2 = 2^3 – 2^2 = 8 – 4 = 4 ≠ 0. Unit digit of p cannot be 2; 2. Say p = 4; p^3 – p^2 = 4^3 – 4^2 = 64 – ...” February 22, 2019 Jay@ManhattanReview posted a reply to If there are more than two numbers in a certain list, is in the Data Sufficiency forum “Let''s take each statement one by one. 1) The product of any two numbers in the list is equal to 0. Case 1: Set: {0, 0, 0, 0, 0}. The answer is yes. Case 2: Set: {0, 0, 0, 0, 1}. The answer is no. No unique answer. Insufficient. 2) The sum of any two numbers in the list is equal to 0. ...” February 21, 2019 Jay@ManhattanReview posted a reply to How old, rounded to the nearest year, was Jim in May 1989? in the Data Sufficiency forum “Let''s take each statement one by one. 1) Jim''s friend Steve, who is exactly 2 years older than Jim, turned 25 years old in 1972. => Jim turned 23 years in 1972; thus, he would turn 23 + (1989 – 1972) = 40 in 1989. However, this is insufficient. The question asks, "How old, ...” February 21, 2019 Jay@ManhattanReview posted a reply to In a class of 30 students, 2 students did not borrow any in the Problem Solving forum “Total number of books borrowed = T = 30*2 = 60; Total number of books borrowed by 12 students = A = 1*12 = 12; Total number of books borrowed by 10 students = B = 2*10 = 20; Thus, the number of students who borrowed at least 3 books = 30 – 2 – 12 – 10 = 6; Since we need to maximize ...” February 21, 2019 Jay@ManhattanReview posted a reply to Two hoses (A and B) are filling a pool. Working alone at in the Problem Solving forum “Working together hoses A and B will fill 1/6 + 1/4 = 5/12 part of the pool Thus, they together can fill completely in 12/5 hours Given that they together filled half the pool, they would work for 1/2 of 12/5 = 6/5 hours Part of the work done by hose B during that period = 1/4*6/5 = 3/10 ...” February 21, 2019 Jay@ManhattanReview posted a reply to If x, y, and z are three-digit positive integers and if x = in the Data Sufficiency forum “Say, x = abc; y = def; z = ghi We are given hat x = y + z. Thus, abc = def + ghi We have to determine whether a = d + g. This is true if there is no carryover from the tens digits'' sum, or e + h ≤ 9. (1) The tens digit of x is equal to the sum of the tens digits of y and z. e ...” February 20, 2019 Jay@ManhattanReview posted a reply to In the figure above, if x and y are each less than 90 and PS in the Data Sufficiency forum “Given: 1. PS is parallel to QR; 2. xº < 90º and yº < 90º We have to determine whether PQ < SR. Let''s take each statement one by one. (1) x > y Since 0 < x < 90 and 0 < y < 90, and x > y, we can vizualize that SR will be flatter than PQ, thus, PQ ...” February 20, 2019 Jay@ManhattanReview posted a reply to If two integers are chosen at random out of the set {2, 5, 7 in the Problem Solving forum “Number of ways, we can choose 2 integers out of 4 = 4C2 = 4.3/1.2 = 6 In the following for ways, the chosen two integers can be written in a^2 – b^2 form. (a). 2 x 8 = 16 = 5^2 – 3^2; (b). 5 x 8 = 40 = 7^2 – 3^2; (c). 5 x 7 = 35 = 6^2 – 3^2; (d). 7 x 8 = 56 = 9^2 – 5^2 Thus, ...” February 20, 2019 Jay@ManhattanReview posted a reply to The figure shown represents a board with 4 rows of pegs, and in the Problem Solving forum “So, there are three ways by which the ball can go in Cell 2. If the ball goes... 1. Left --> Left --> Right; probability = 1/2*1/2*1/2 = 1/8; 2. Left --> Right --> Right; probability = 1/2*1/2*1/2 = 1/8; 3. Right --> Left --> Left; probability = 1/2*1/2*1/2 = 1/8 Total ...” February 20, 2019 Jay@ManhattanReview posted a reply to One-sixth of the attendees at a certain convention are femal in the Problem Solving forum “Already replied two days back... https://www.beatthegmat.com/one-sixth-of-the-attendees-at-a-certain-convention-are-t306503.html#827021 Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes San Diego | GMAT Tutoring Atlanta | GRE Prep Jacksonville | ...” February 19, 2019 Jay@ManhattanReview posted a reply to Mr. Smith purchases books from the bargain bin. He buys only in the Data Sufficiency forum “Say the number of$1, $2, and$7 books are x, y, and z, respectively. We have to get the value of z. Let''s take each statement one by one. (1) Mr. Smith spends $24 on bargain books. => x + 2y + 7z = 24 Can''t get the unique value of z. z can be 1, 2 or 3. No unique value. ...” February 19, 2019 Jay@ManhattanReview posted a reply to How many apples are there in the box? in the Data Sufficiency forum “Average (arithmetic mean) weight of the apples = (Total weight of the apples) / (Number of apples) Number of apples = (Total weight of the apples) / (Average (arithmetic mean) weight of the apples) = 200/8 = 25. Sufficient. The correct answer: C Hope this helps! -Jay ...” February 19, 2019 Jay@ManhattanReview posted a reply to In a class of 30 students, Emma secured the third rank among in the Data Sufficiency forum “Refer to the images given below, which are self-explanatory. https://i.postimg.cc/PPp0vFXt/Tab1.png https://i.postimg.cc/bD53zp21/Tab2.png The correct answer: B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes San Diego | GMAT Tutoring ...” February 19, 2019 Jay@ManhattanReview posted a reply to Jason can stack two shelves in 3 hours and Maria can stack in the Problem Solving forum “Given that Jason can stack two shelves in 3 hours, he can stack 13 stacks in 3/2*13 = 39/2 hours and Maria can stack three shelves in 2 hours, she can stack 13 stacks in 2/3*13 = 26/3 hours Working together they together stack 13 shelves in reciprocal of B Hope this helps! -Jay ...” February 18, 2019 Jay@ManhattanReview posted a reply to If y is 80% greater than x, than x is what % less than y? ( in the Problem Solving forum “Say x = 100; thus, y = 100 + 80% of 100 = 100 + 80 = 80 Thus, x (= 100) is 80 less than y (= 180). Required percent = (80/180)*100% = 44 4/9% The correct answer: D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Atlanta | GMAT Tutoring ...” February 18, 2019 Jay@ManhattanReview posted a reply to One-sixth of the attendees at a certain convention are in the Problem Solving forum “See the image below, which is self-explanatory. https://i.postimg.cc/NK2KbhBL/Students.png The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Atlanta | GMAT Tutoring Philadelphia | GRE Prep Denver | TOEFL Prep Classes San ...” February 18, 2019 Jay@ManhattanReview posted a reply to John has to hammer 100 railroad spikes for a new line his co in the Problem Solving forum “Given that John can hammer 8 spikes per hour, time needed to hammer 100 spikes, working alone = 100/8 = 25/2 hours. Since John alone hammered half the number of spikes (100/2 = 50), the number of hours John worked alone = 1/2 of 25/2 = 25/4 hours Now John''s coworker Paul also joined him and ...” February 18, 2019 Jay@ManhattanReview posted a reply to In 2001, John invests x dollars in a special account that yi in the Problem Solving forum “Given that the sum$x amounted to $250 in 2006 and to$270 in 2008, we can deduce that the simple interest on $x for 2 years = 270 – 250 =$20 Thus, 20 = x*y*2/100 => xy = 1,000 Again, since the sum $x invested in 2001 amounted to$250 in 2006, SI for 5 years is $(250 – x). Thus, 250 ...” February 18, 2019 Jay@ManhattanReview posted a reply to The inside of a rectangular carton is 48 centimeters long, 3 in the Data Sufficiency forum “Let''s take each statement one by one. (1) Each of the cans has a radius of 4 centimeters. Thus, the diameter of each can = 8 cm and 48/8 = 6 cans can fit in a row; similarly, 32/8 = 4 cans can fit in a column. Thus, k = 6*4 = 24. Sufficient. (2) Six of the cans fit exactly along the ...” February 16, 2019 Jay@ManhattanReview posted a reply to Derek's cell phone bill shows total minutes used for each of in the Data Sufficiency forum “Given: Derek''s cell phone bill shows total minutes used for each of two categories: peak minutes and off-peak minutes. Derek used a total of 75 minutes last month. We have to determine the number of off-peak minutes he used. Let''s take each statement one by one. 1) Derek used twice as ...” February 15, 2019 Jay@ManhattanReview posted a reply to Set S consists of all the positive multiples of 5 that are l in the Data Sufficiency forum “Given: 1. Set S consists of all the positive multiples of 5 such that they are less than K, and K is a positive integer not divisible by 5. For example say, K = 21, then set S:{ 5, 10, 15, 20}; however, if say K = 52, then set S:{ 5, 10, 15, 20, 25, 30, 35, 40, 45, 50} 2. The mean of Set S ...” February 15, 2019 Jay@ManhattanReview posted a reply to A certain military vehicle can run on pure Fuel X, pure Fuel in the Data Sufficiency forum “Say there be x gallons of fuel X, and y gallons of fuel Y in the tank. Cost per gallon = (3x + 5y)/(x + y) We have to get the value of (3x + 5y)/(x + y). Let''s take each statement one by one. (1) Using fuel currently in its tank, the vehicle burned 8 gallons to cover 200 miles. => ...” February 15, 2019 Jay@ManhattanReview posted a reply to For how many integer values of m is x < m < y ? (1) x in the Data Sufficiency forum “Given: x < m < y We have to determine how many integer values of m exist. Let''s take each statement one by one. (1) x and y are positive integers. Certainly insufficient. (2) y – x = 6 Case 1: Say y = 10.5 and x = 4.5, then m = {10, 9, 8, 7, 6, 5, 4}; there are a total of ...” February 14, 2019 Jay@ManhattanReview posted a reply to Is $$a^3 + b^2 + 4$$ divisible by 6? in the Data Sufficiency forum “For a^3 + b^2 + 4 to be divisible by 6, it must be divisible by 2 as well as 3. Thus, a^3 + b^2 + 4 must be even. Let''s take each statement one by one. (I) b is odd If a is even, then a^3 is even and b^2 is odd; thus, a^3 + b^2 + 4 is odd. The answer is no. If a is odd, say a = b = 1, ...” February 13, 2019 Jay@ManhattanReview posted a reply to In a certain senior class, 72 percent of the male students in the Data Sufficiency forum “Say there are x numbers of male and y numbers of female students. Thus, we have # of students who have students have applied to college = 72% of x + 80% of y = 0.72x + 0.80y We have to get the value of x/(x + y). Let''s take each statement one by one. 1) There are 840 students in the ...” February 13, 2019 Jay@ManhattanReview posted a reply to If a, b, c, d are 4 non-negative integers. Is (a+c) even? in the Data Sufficiency forum “Given: a, b, c, d are 4 non-negative integers. We have to determine whether (a + c) is even. Let''s take each statement one by one. (1) a^2 + b^2 + c^2 is even. Case 1: Say a = 0; b = c = 1, then we have a^2 + b^2 + c^2 = 0^2 + 1^2 + 1^2 = 2, an even number. However, a + c = 0 + 1 = 1, ...” February 13, 2019 Jay@ManhattanReview posted a reply to Square ABCD has an area of 9 square inches. Sides AD and BC in the Data Sufficiency forum “Given that the square ABCD has an area of 9 square inches, we have AD = BC = 3 inches. Thus, the increased length of AD and BC is AD'' and BC'' = (3 + x) inches. We have to determine the value of x. Let''s take each statement one by one. (1) The diagonal of the resulting rectangle measures ...” February 12, 2019 Jay@ManhattanReview posted a reply to The table above shows the morning schedule for train X. in the Data Sufficiency forum “Let''s take each statement one by one. 1) Juan arrived at station T on Monday morning 1 hour and 2 minutes after he left station S. Case 1: If John started from station S at 7:08, he arrived at station T at 8:10, scheduled time. The answer is yes. Case 2: If John started late from station S ...” February 12, 2019 Jay@ManhattanReview posted a reply to If n is a positive integer and r is the remainder when (n-1) in the Data Sufficiency forum “We have to determine whether (n – 1)(n + 1) is divided by 24. Let''s take each statement one by one. 1) n is not divisible by 2. => n is an odd number. Thus, (n – 1) and (n + 1) are even. Note that at least one between (n – 1) and (n + 1) must be divisible by 4, thus, (n – 1)*(n ...” February 12, 2019 Jay@ManhattanReview posted a reply to The figure above shows the railway tracks between three in the Problem Solving forum “Route of the train from A to B: ACB = AC + CB = 240 + √(100^2 + 240^2) = 240 + 260 = 500 km Route of the train from A to B: BCA = ACB = BC + CA = 500 km Since from the scheduled time of their departure, 9 am, the train from A starts 1/2 an hour early (8:30 am) and train B starts 1/2 and later ...” February 10, 2019 Jay@ManhattanReview posted a reply to In the xy coordinate plane, line L and line K intersect at in the Data Sufficiency forum “Say the equations of line L and K are y = m1*x + c1; eqn of line L; y = m2*x + c2; eqn of line K Here, m1 and m2 are slopes of line L and line K; and c1 and c2 are y-intercepts of line L and line K. We have to determine whether m1*m2 < 0. Let''s take each statement one by one. 1) ...” February 8, 2019 Jay@ManhattanReview posted a reply to At a farmers market, a florist sells only roses, and in the Data Sufficiency forum “Say he sold x numbers of individual roses and y numbers of bouquets of one dozen roses. Thus, the total number of roses sold = x + 12y. Given: Total sales = 2x + 19y We have to get the value of x + 12y. Let''s take each statement one by one. 1) The florist made$190. 2x + 19y = ...”
February 7, 2019
Jay@ManhattanReview posted a reply to A box contains red and blue balls only. If there are 8 balls in the Data Sufficiency forum
“We have to determine the number of red balls. Say the number of red balls is r; thus, the number of blue balls = 8 – r. Let''s take each statement one by one. (1) If two balls are randomly selected without replacement, the probability that both balls are red is 5/14 => rC2 / 8C2 = ...”
February 7, 2019
Jay@ManhattanReview posted a reply to Samantha investes i1 dollars in bond X, which pays r1 in the Data Sufficiency forum
“Simple interest earned on the first investment = i1*r1*1/100 =i1*r1/100; Simple interest earned on the second investment = i2*r2*1/100 =i2*r2/100; We have to determine whether i1*r1/100 > i2*r2/100, or i1*r1 > i2*r2. Let''s take each statement one by one. 1) (r1)^2 > (r2)^2. ...”
February 7, 2019
Jay@ManhattanReview posted a reply to A manufacturer produced x percent more video cameras in 1994 in the Data Sufficiency forum
“Given: # of video cameras produced in 1993 = 1000 Thus, # of video cameras produced in 1994 = 1000 + x% of 1000 = 1000(1 + x%) = 1000(1 + x/100); # of video cameras produced in 1995 = 1000(1 + x/100)(1 + y%) = 1000(1 + x/100)(1 + y/100) = 1000(1 + x/100 + y/100 + xy/10000) = 1000B Hope ...”
February 7, 2019
Jay@ManhattanReview posted a reply to A set of 11 positive integers have an average of 25. Which in the Problem Solving forum
“Given the average of 11 positive integers is 25, we have the sum of the 11 positive integers = 11*25 = 275. Again, given that there are 11 numbers in the set, the median would be the 6th number. Since we need to maximize the median, we must have the values of 1st to 5th numbers smallest. The ...”
February 6, 2019
Jay@ManhattanReview posted a reply to A vendor sells specialty gift basket at a price of $50.00 in the Problem Solving forum “Given that the vendor marks up 25% above the cost, the cost per basket = 50 / (100 + 25)% =$40; Selling price per basket to make 20% profit = 40 + 20% of 40 = $48. Thus, the vendor can return (50 – 48)*120 =$240 for 15 baksets => The vendor should refund 240/15 = $16 per basket so ...” February 6, 2019 Jay@ManhattanReview posted a reply to X is a three-digit positive integer in which each digit is e in the Data Sufficiency forum “This can be solved efficiently with some hit and trial approach. Let''s take each statement one by one. (1) The hundreds digit of XY is 6. Given that the hundreds digit of XY is 6, we can have two cases: 1. (X, Y):(121, 121) and 2. (X, Y):(112, 112). In each case, the remainder when X is ...” February 6, 2019 Jay@ManhattanReview posted a reply to X is a three-digit positive integer in which each digit is e in the Data Sufficiency forum “This can be solved efficiently with some hit and trial approach. Let''s take each statement one by one. (1) The hundreds digit of XY is 6. Given that the hundreds digit of XY is 6, we can have two cases: 1. (X, Y):(121, 121) and 2. (X, Y):(112, 112). In each case, the remainder when X is ...” February 6, 2019 Jay@ManhattanReview posted a reply to Of the N candies in a bag, some are peppermint and the rest in the Data Sufficiency forum “Say there are P numbers of peppermints and S numbers of spearmints. Thus, we have P + S = N. We have to get the value of N. Let''s take each statement one by one. 1) If 1 peppermint candy was removed from the N candies, 1/5 of the remaining candies would be peppermint. => P – 1 = ...” February 6, 2019 Jay@ManhattanReview posted a reply to In a certain sock drawer, there are 4 pairs of black socks, in the Problem Solving forum “It''s already answered at the BTG. Pl. find it here: https://www.beatthegmat.com/probability-t99931.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Austin | GMAT Tutoring Denver | GRE Prep Los Angeles | TOEFL Prep Classes Las Vegas | and ...” February 4, 2019 Jay@ManhattanReview posted a reply to The perimeter of a rectangular garden is 360 ft. What is the in the Data Sufficiency forum “Perimeter of a rectangular garden = 2(a + b) = 360; where a = length and b = width We have to determine the value of a. Let''s take each statement one by one. 1) The length of the garden is twice the width. => a = 2b Thus, from 2(a + b) = 360 and a = 2b, we have 2(2b + b) = 360 ...” February 4, 2019 Jay@ManhattanReview posted a reply to Is triangle ABC obtuse angled? (1) a^2 + b^2 > c^2 (2) in the Data Sufficiency forum “It''s already replied at the BTG> Here it is https://www.beatthegmat.com/is-triangle-abc-obtuse-angled-t305338.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Austin | GMAT Tutoring Denver | GRE Prep Los Angeles | TOEFL Prep Classes Las ...” February 4, 2019 Jay@ManhattanReview posted a reply to If x, y, and z are different positive integers, is x prime? in the Data Sufficiency forum “Given: x, y, and z are different positive integers. We have to determine whether x is prime. Let''s take each statement one by one. (1) xyz = 30 Factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. Case 1: Say xyz = 30 = 1*2*15; x = 1 is non-prime. Case 2: Say xyz = 30 = 2*1*15; x = 2 is ...” February 4, 2019 February 4, 2019 Jay@ManhattanReview posted a reply to One number, k, is selected at random from a set of 11 in the Data Sufficiency forum “If k = 10 is a member of the set, then the probability that the number randomly selected in 10 = 1/11; however, If k = 10 is a NOT member of the set, then the probability that the number randomly selected in 10 = 0. So, we have to determine whether 10 is a member of the set. Let''s take each ...” February 2, 2019 Jay@ManhattanReview posted a reply to Is the median of the 3 different integers equal to their in the Data Sufficiency forum “Let''s take each statement one by one. 1) The median of the 3 integers is 19. Say the three integers are: x, y and z such that x < y < z Case 1: Say the integers are 1, 19, 20. Average ≠ Median. The answer is No. Case 2: Say the integers are 18, 19, 20. Average = Median. The ...” January 31, 2019 Jay@ManhattanReview posted a reply to A jar contains only black marbles and white marbles. If two in the Data Sufficiency forum “Say there are a total of 3x numbers of marbles; thus, there are 2x numbers of black marbles and x numbers of white marbles. We have to get the value of x. Let''s take each statement one by one. (1) If two marbles were to be drawn, simultaneously and at random, from the jar, there is a 5/12 ...” January 31, 2019 Jay@ManhattanReview posted a reply to If the drama club and music club is combined, what percent in the Data Sufficiency forum “The key to this question is not to assume that members of the drama club and that of music club are exclusive, i.e., if X is a member of the drama club, he/she cannot be a member of the music club. The number of members of both the club is not given, thus, the answer is E. The correct answer: ...” January 31, 2019 Jay@ManhattanReview posted a reply to Dwight and Mose decide to build a new barn on their farm, an in the Problem Solving forum “Since the question asks for the work left when Mose begins his third shift, Dwight must have done three and Mose must have done two shift. Since we will have to deal with 1/4 three times and 1/6 two times, for the ease of calculation, let''s assume that total work = (4^3)*(6^2) = 2304 1. Work ...” January 30, 2019 Jay@ManhattanReview posted a reply to Each of three students is given fifteen tokens to spend at a in the Data Sufficiency forum “Already answered in the BTG. https://www.beatthegmat.com/each-of-three-students-is-given-fifteen-tokens-to-spend-at-a-t303697.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes San Francisco | GMAT Tutoring Boston | GRE Prep Philadelphia | ...” January 30, 2019 Jay@ManhattanReview posted a reply to The largest bonus that Felix can receive this year is equal in the Data Sufficiency forum “Say Felix''s annual salary is$S. Thus, The largest bonus that Felix can receive = 20% of S = S/5; The smallest bonus that Felix can receive = 30% of 20% of S = 3S/50 We have to determine that value of S. 1. The smallest possible bonus that Felix can receive this year is $4800.00. ...” January 30, 2019 Jay@ManhattanReview posted a reply to A store sells two types of birdfeeder: Alphas and Bravos. in the Data Sufficiency forum “It''s here: https://www.beatthegmat.com/a-store-sells-two-types-of-birdfeeder-alphas-and-bravos-t304802.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Los Angeles | GMAT Tutoring Tampa | GRE Prep Miami | TOEFL Prep Classes Boston | and many ...” January 29, 2019 Jay@ManhattanReview posted a reply to Of the 66 people in a certain auditorium, at most 6 people h in the Data Sufficiency forum “Let''s take each statement one by one. (1) More of the people in the auditorium have their birthday in February than in March. Since to exclude January, from February to December, in each month, 6 persons b''day must fall in each of these 11 months. However, we know that in March, the number ...” January 29, 2019 Jay@ManhattanReview posted a reply to Paul, a painter, paints only flowers or cats in his notebook in the Data Sufficiency forum “https://i.postimg.cc/D8f6fGHm/Picture1.png Thus, (7 + 11) + (x + 11) = x + 39 => y = 21. Sufficient. The correct answer: C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes Los Angeles | GMAT Tutoring Tampa | GRE Prep Miami | TOEFL Prep ...” January 29, 2019 Jay@ManhattanReview posted a reply to Each number in each of lists L and M above is positive. in the GMAT Math forum “Given that the ratio of the average (arithmetic mean) of the numbers in list L to the average of the numbers in list M is 3 to 7, let''s take the average of list L = 3x and the average of list M = 7x. Thus, the sum of 7 numbers in list (M + L) = 4*(7x) + 5*(3x) = 28x + 15x = 43x Thus, average ...” January 25, 2019 Jay@ManhattanReview posted a reply to For a certain city's library, the average cost of purchasing in the Data Sufficiency forum “This one is already answered. Here it is: https://www.beatthegmat.com/for-a-certain-city-s-library-the-average-cost-t295970.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: GMAT Classes New York | GMAT Tutoring Dallas | GRE Prep San Diego | TOEFL Prep ...” January 25, 2019 Jay@ManhattanReview posted a reply to Ayayai electronics is a company manufacturing MP3 players. in the Problem Solving forum “See this image. https://i.postimg.cc/c6X0vM6N/iMe.png Thus, (1,000 + x) + x = 11,000 => x = 5,000 Thus, total number of players = 21,000 + x = 21,000 + 5,000 = 26,000. The correct answer: C Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan ...” January 23, 2019 Jay@ManhattanReview posted a reply to M is a rectangular solid. Find the volume of M Statement #1 in the Data Sufficiency forum “Given: M is a rectangular solid. We have to find the volume of M. We know that the volume of a rectangular solid = a*b*c; where a = = length, b = breadth, and c = height Let''s take each statement one by one. Statement #1: The bottom face of M has an area of 28, and the front face, an ...” January 23, 2019 Jay@ManhattanReview posted a reply to Brian takes a weekend trip to visit a friend. What is his in the Data Sufficiency forum “We have to find out the average rate for the there-and-back trip. Let''s take each statement one by one. 1) Brian took the same route for both segments. No information about speeds. Insufficient. 2) Brian averaged 80 mph for the first segment and 50 mph for the second segment. If the ...” January 23, 2019 Jay@ManhattanReview posted a reply to In a certain international contest the winners received only in the Data Sufficiency forum “Say The number of gold received by France = x; The number of silver received by France = y; The number of gold received by Spain = a; The number of silver received by Spain = b Thus, total medals received by France = x + y; and total medals received by Spain = a + b We have to get ...” January 22, 2019 Jay@ManhattanReview posted a reply to What is the value of x? in the Data Sufficiency forum “Note that a prime number has 3 factors, a perfect square of a prime number has three factors, a perfect square of a non-prime number and others has more than three factors. 1. Prime number: Say 2, 3, 5, 7, 11. All have two factors. 2. Perfect square of prime numbers: Say 4, 9, 25, 49, etc. All ...” January 21, 2019 Jay@ManhattanReview posted a reply to If a is a positive integer and 81 divided by a in the Data Sufficiency forum “Given: a is a positive integer and 81 divided by a results in a remainder of 1. We have to find out the value of a. From the given information, we know that a is a factor of 80. Let''s take each statement one by one. 1) The remainder when a is divided by 40 is 0. => a is a factor ...” January 21, 2019 Jay@ManhattanReview posted a reply to A certain furniture store must choose between trucking in the GMAT Math forum “Given: Company A''s charges: Per delivery Company B''s charges: Per week + A mileage charge We have to determine which of the two companies would charge less to the store. Say the number of deliveries per week = n and mileage per week = m Let''s take each statement one by one. (1) ...” January 21, 2019 Jay@ManhattanReview posted a reply to If $$\sqrt{x}\$$ and $$\sqrt{y}$$ are nonzero in the GMAT Math forum “Given: √x and √y are nonzero integers We have to find out the remainder when x is divided by y. Let''s take each statement one by one. (1) √x – √y = 1 Case 1: Say x = 4 and y = 1, then we have √4 – √1 = 1. The remainder when x = 4 is divided by y = 1 is 0. Case 2: Say x ...” January 21, 2019 Jay@ManhattanReview posted a reply to In a carnival game, players try to toss marbles in to a milk in the Data Sufficiency forum “Say the number of marbles that hit the jug without going in is p and the number of marbles that went into the jug is q. Thus, m = 1*p + 2*q m = p + 2q Since 2q is an even number irrespective of whether q is even or odd, whether m is even of odd would depend on whether p is odd. Question ...” January 20, 2019 Jay@ManhattanReview posted a reply to At the beginning of January 2003, Elizabeth invested money in the Data Sufficiency forum “Say Elizabeth invested$P at r% per annum rate of interest, and the interested in compounded n times in a year. Thus, the rate of interest per period = (r/n)% and the number of periods = 7n Thus, the amount (Say A) after 7 years A = P(1 + (r/n)%)^7n So, there are three variables: P, r ...”
January 20, 2019
Jay@ManhattanReview posted a reply to A disc jockey plays only hip - hop and country - western in the Data Sufficiency forum
“Say the number of hip - hop records is 7 and the number of country - western records is 4. Thus, the total number of records = 4 + 7 = 11. Thus, 4/11 of the records he plays are country - western. The correct answer: D Hope this helps! -Jay _________________ Manhattan Review ...”
January 20, 2019
Jay@ManhattanReview posted a reply to In the figure above, segments PQ and QR are each parallel to in the Data Sufficiency forum
“We have to get the value of the ratio of the length of QR to PQ. Let''s take each statement one by one. (1) The slope of the line that passes through points P and R is 0.75. Say the coordinates of points P are (x1, y1) and the coordinates of points R are (x2, y2); thus, the coordinates of ...”
January 20, 2019
Jay@ManhattanReview posted a reply to A company bought some desks at a price of $150 each and some in the Data Sufficiency forum “Say the number of desks = x and the number of chairs = y Thus, 150x + 50y = Total sales We have to determine whether y ≥ 40. Let''s take each statement one by one. 1) The total price of the desk and chairs is 5,000. 150x + 50y = 5,000 => 3x + y = 100 Case 1: Say y = 40, ...” January 20, 2019 Jay@ManhattanReview posted a reply to What was a certain company's revenue last year? in the Data Sufficiency forum “Say Revenue = R and Expenses = E Let''s take each statement one by one. 1) Last year gross profit was$4,100. Thus, R – E = 4100. Can''t get the unique value of R. Insufficient. 2) Last year revenue was 50% greater than expenses. => R = 1.5E. Can''t get the unique value of R. ...”
January 20, 2019
Jay@ManhattanReview posted a reply to 30 people in total attended an office party for a in the Data Sufficiency forum
“Let''s take each statement one by one. 1) One person ate exactly 2 slices of cake. This statement is open to a couple of interpretations. 1. EXACTLY one person ate exactly 2 slices of cake. 2. AT LEAST one person ate exactly 2 slices of cake. If we take #1 as interpretation, we get that ...”
January 20, 2019
Jay@ManhattanReview posted a reply to Set A = {2, 3, 4, 5}, and set B = {4, 5, 6, 7, 8}. If P = th in the Problem Solving forum
“Apt advice Brent. When it comes to counting questions, many students are reluctant to simply list and count the possible outcomes. -Jay _________________ Manhattan Review Locations: Manhattan Review Kukatpally | GMAT Prep Jayanagar | GRE Prep Tarnaka | Madhapur GRE Coaching | and many ...”
January 20, 2019
Jay@ManhattanReview posted a reply to In the addition above, #, @, and & each represent a dist in the Data Sufficiency forum
“We have # + @ = &, where #, @, and & each represents a distinct, positive digit and & is even We have to get the value of #. Let''s take each statement one by one. (1) # and @ are even and & = 6. There are two possibilities: 1. # = 2 and @ = 4 and 2. # = 4 and @ = 2. No ...”
January 18, 2019
Jay@ManhattanReview posted a reply to A cake recipe uses a constant ratio of 2 teaspoons vanilla in the Data Sufficiency forum
“Given: Ratio vanilla extract (teaspoons) to chocolate (ounce) = 2 : 1 We have to find out how many ounces of chocolate would be needed to make a cake that serves 6 people. Let''s take each statement one by one. 1) The original recipe calls for exactly five teaspoons of vanilla extract. ...”
January 18, 2019
Jay@ManhattanReview posted a reply to A certain packing box contains books between 50 to 60. How in the Data Sufficiency forum
“Given: 50 < Number of books < 60 We have to find out the number of books. Let''s take each statement one by one. 1) If the books are counted by three, there will be one book left over. The statement means that the number of books divided by 3 will leave a remainder 1. Thus, ...”
January 18, 2019
Jay@ManhattanReview posted a reply to Sarah is in a room with 6 other children. If the other child in the Data Sufficiency forum
“Given: Ages of 6 children 2, 4, 5, 8, 10, and 13 years We have to determine whether Sarah is 7 years old. Let''s take each statement one by one. (1) The age of the fourth oldest child is equal to the average (arithmetic mean) of the seven children’s ages. Case 1: Say Sarah is 7 years ...”
January 17, 2019
Jay@ManhattanReview posted a reply to Which of the following lines is perpendicular to 4x+5y=9 in the Problem Solving forum
“Note that two lines are perpendicular to each other if the product of their slopes is 1. Let''s first find out the slope of the given line 4x + 5y = 9. Let''s transform it into y = mx + c form, where m is the slope of the line. Thus, 4x+5y=9 => y = (–4/5)x + 9. Thus, m = –4/5 Say the ...”
January 17, 2019
Jay@ManhattanReview posted a reply to Mixture A is 15 percent alcohol, and mixture B is 50 percent in the Problem Solving forum
“Say mixture A is x gallons and mixture B is y gallons. Thus, total amount of alcohol in the combined mixture = 15% of x + 50% of y = 0.15x + 0.5y Again, the amount of alcohol in the combined mixture = 30% of 4 = 1.2 gallons Thus, 0.15x + 0.5y = 1.2 We also know that x + y = 4. Tus, y = 4 ...”
January 16, 2019
Jay@ManhattanReview posted a reply to What was the amount of money donated to a certain charity? in the Data Sufficiency forum
“Let''s take each statement one by one. 1) Of the amount donated, 40 percent came from corporate donations. No information about the amount of donation. Insufficient. 2) Of the amount donated, $1.5 million came from noncorporate donations. No information about the amount of donation from ...” January 16, 2019 Jay@ManhattanReview posted a reply to Tyler sells two types of milkshakes: chocolate and Oreo. in the Data Sufficiency forum “Read a nice article that includes this question. Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Tarnaka | GMAT Prep Madhapur | GRE Prep Kukatpally | Jayanagar GRE Coaching | and many more... Schedule your free consultation with an experienced GMAT ...” January 16, 2019 Jay@ManhattanReview posted a reply to Twenty people at a meeting were born during the month of in the Problem Solving forum “Probability that at least two people sharing the same birthday = 1 – E Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Jayanagar | GMAT Prep Tarnaka | GRE Prep Madhapur | Kukatpally GRE Coaching | and many more... Schedule your free consultation ...” January 15, 2019 Jay@ManhattanReview posted a reply to How many hours did it take Helen to drive from her house to in the Data Sufficiency forum “Say the distance from Helen''s home to her parent''s house is d kilometers. We have to get the value of d. Let''s take each statement one by one. 1) Helen''s average speed on this trip was 72 kilometers per hour. => time taken by Helen = d/72 hours. Can''t get the value of d. ...” January 15, 2019 Jay@ManhattanReview posted a reply to The cost of a square slab is proportional to its thickness a in the Data Sufficiency forum “Say the cost of the slab is C, thickness is T and length is L. It is given C is proportional to T and square of L. Say a constant is K. Thus, C = KTL^2 We are given that T = 0.1 meter, and L = 3 meters Thus, C = K*0.1*3^2 C = 0.9K If we get the value of K, we get the answer. ...” January 15, 2019 Jay@ManhattanReview posted a reply to Which of the following CANNOT result in an integer? A. The in the Problem Solving forum “Let''s take each option one by one. A. The product of two integers divided by the reciprocal of a different integer Say the three integers x, y and z. Thus, xy/(1z) = xyz. Product of three integers is always an integer. Option A can''t be the correct option. B. An even integer divided by ...” January 15, 2019 Jay@ManhattanReview posted a reply to If Jay has 99 problems, in how many ways can he select k of in the Data Sufficiency forum “Note that unlike Permutation, in case of the combination, nCr = nC(n–r). Thus, we do not always get the unique value of r. Let''s take an example. • Number of ways of choosing 3 things out of 4 = 4C3 = (4.3.2)/(1.2.3) = 4; and • Number of ways of choosing 1 thing out of 4 = 4C1 = 4 ...” January 14, 2019 Jay@ManhattanReview posted a reply to m is a multiple of 13. Is mn a multiple of 195? in the Data Sufficiency forum “Given that m is a multiple of 13, we have m = 13k, where k is any integer. If mn a multiple of 195, mn = 195p, where p is any integer. mn = 195p => 13kn = 195p => n = 195p/13k = 15p/k. => n = 15p/k Let''s take each statement one by one. (1) n has every factor that 45 has. ...” January 14, 2019 Jay@ManhattanReview posted a reply to If set S consists of the numbers 1, 5, -2, 8, and n, is 0 &l in the Data Sufficiency forum “Given: Set S: {–2, 1, 5, 8, n} Question; Is 0 < n < 7 ? Let''s take each statement one by one. (1) The median of the numbers in S is less than 5. Case 1: Considering n ≤ 0. Say n = –3 => Set S: : {–3, –2, 1, 5, 8}. Median = 1 < 5. The answer is No. Case 2: ...” January 14, 2019 Jay@ManhattanReview posted a reply to At a certain fruit stand, the price of each apple is 40 in the Problem Solving forum “Say Mary x numbers of apples and y numbers of oranges. Thus, x +y = 10 and 40x + 60y = 56*10 40x + 60y = 560 Say Mary put back p numbers of oranges, thus, we have 40x + 60y – 60 p = 52(10 – p) 560 – 60 p = 520 – 52p p = 5. The correct answer: E Hope this helps! -Jay ...” January 11, 2019 Jay@ManhattanReview posted a reply to In a certain bathtub, both the hot and cold water fixtures in the Problem Solving forum “Say c = 10 hours and h = 20 hours since it is given that c < h. Thus, we have 1/c + 1/h = 1/t 1/10 + 1/20 = 1/h h = 20/3 = 6.67 hours Let''s see the statements: I. 0 < t < h: 0 < 6.67 < 20. This is correct. II. c < t < h: 10 > 6.66 < 20. This is not ...” January 11, 2019 Jay@ManhattanReview posted a reply to By what percent is 25 greater than 15? in the Problem Solving forum “25 is greater than 15 by 10 (= 25 – 15). Thus, 25 is greater than 15 by (10/15)*100% = 66 2/3%. The correct answer: E Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Chennai | GMAT Prep Himayatnagar | GRE Prep Hyderabad | Bangalore GRE Coaching | ...” January 11, 2019 Jay@ManhattanReview posted a reply to A recent lunch meeting at a certain club was attended by mem in the Data Sufficiency forum “Say the number of members was x and the number of guests was y; thus, the total number of people = x + y. We have to get the value of x. Let''s take each statement one by one. (1) A total of 20 people attended the meeting. => x + y = 20. Can''t get the unique value of x. ...” January 11, 2019 Jay@ManhattanReview posted a reply to Ted and Barney work for the same company but earn different in the Data Sufficiency forum “Say the incomes of Ted and Barney are x, and y, respectively; and the expenditures of Ted and Barney are p, and q, respectively. Thus, the savings of Ted and Barney would be (x – y), and (p – q), respectively. The portion of savings of Ted and Barney are (x – y)/x = 1 – y/x, and (p – ...” January 10, 2019 Jay@ManhattanReview posted a reply to Given that x ≠ 5, is x>{1/(x-5)^2} in the Data Sufficiency forum “Given: x ≠ 5 Question: Is x > {1/(x – 5)^2}? Let''s take each statement one by one. (1) x > 0 Case 1: Say x = 11 Thus, x > {1/(x – 5)^2} = 11 ? {1/(11 – 5)^2} => 11 > 1/36. The answer is Yes. Case 2: Say x = 1/100 Thus, x > {1/(x – 5)^2} = 1/100 ? ...” January 10, 2019 Jay@ManhattanReview posted a reply to Gunther, the pizza delivery boy, went out from the store in the Problem Solving forum “Already answered at the BTG. https://www.beatthegmat.com/gunther-the-pizza-delivery-boy-went-out-from-the-store-t304229.html Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Bangalore | GMAT Prep Chennai | GRE Prep Himayatnagar | Hyderabad GRE Coaching ...” January 10, 2019 Jay@ManhattanReview posted a reply to 17^27 has a units digit of: in the Problem Solving forum “Let''s understand the power cycle of 7. • 7^1 = 7; unit digit = 7; • 7^2 = 49; unit digit = 9; • 7^3 = 343; unit digit = 3; • 7^4 = ...1; unit digit = 1; • 7^5 = ...7; unit digit = 7; We see that units digit of the power of 7 repeats after every 4 cycle. Let''s see 17^27 ...” January 10, 2019 Jay@ManhattanReview posted a reply to The water from one outlet, flowing at a constant rate, can f in the Problem Solving forum “Given that the first outlet, flowing at a constant rate, can fill a swimming pool in 9 hours, the part of the pool filled in 1 hour = 1/9; and the second outlet, flowing at a constant rate, can fill a swimming pool in 5 hours, the part of the pool filled in 1 hour = 1/5 Part of the pool filled in ...” January 9, 2019 Jay@ManhattanReview posted a reply to If the ratio of w to x to y is 1 : 2 : 3, what is the value in the Data Sufficiency forum “Given the ratio of w to x to y is 1 : 2 : 3, we have w = p; x = 2p; and y = 3p. Thus, w + x = p + 2p = 3p If we get the value of p, we get the answer. Let''s take each statement one by one. (1) x – w = 5 => 2p – p = p = 5 => p = 5. Sufficient. (2) 3y – 2w = 35 => ...” January 9, 2019 Jay@ManhattanReview posted a reply to For integers x and y, 1 < x < y. Is x^y a factor of 11 in the Data Sufficiency forum “Given: 1 < x < y; where x and y are positive integers We have to determine whether x^y is a factor of 11!. Let''s take each statement one by one. (1) x > 3 Case 1: Say x = Very big number; thus, y is also a very big number. So, can conclude that x^y would not be a factor of 11!. ...” January 9, 2019 Jay@ManhattanReview posted a reply to Working together, Machine A and Machine B can produce in the Data Sufficiency forum “Say working alone, Machine A can produce 200 widgets in a hours and Machine B can produce 200 widgets in b hours. Thus, we have 1/a + 1/b = 1/4 We have to get the value of a. Let''s take each statement one by one. (1) Working alone, Machine B takes 5 hours to produce 50 widgets. => ...” January 8, 2019 Jay@ManhattanReview posted a reply to A department manager distributed a number of pens, pencils, in the Data Sufficiency forum “We have to find out the number of staff members in the department. Let''s take each statement one by one. (1) The numbers of pens, pencils, and pads that each staff member received were in the ratio 2 : 3 : 4, respectively. Say the common ratio is m, thus each staff member received 2m pens, ...” January 8, 2019 Jay@ManhattanReview posted a reply to If the graph of y = x^2 + ax + b passes through the points ( in the Data Sufficiency forum “Note that the y-coordinates of the points m, 0) and (n, 0) are 0; thus, we can replace y = 0 in the equation of the graph y = x^2 + ax + b. => 0 = x^2 + ax + b => x = A Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Vijayawada | GMAT Prep ...” January 8, 2019 Jay@ManhattanReview posted a reply to S is a finite set of numbers. Does S contain more negative in the Data Sufficiency forum “We have to determine whether set S contains more negative numbers than positive numbers. Let''s take each statement one by one. (1) The product of all the numbers in S is –1,200. Case 1: Say Set S has 2 numbers; they are –1200 and 1. The answer is No. Case 2: Say Set S has 4 numbers; ...” January 8, 2019 Jay@ManhattanReview posted a reply to If x and y are nonzero integers, is in the Data Sufficiency forum “We have to determine whether $$\left(x^{-1}+y^{-1}\right)^{-1}\ >\left(x^{-1}\cdot y^{-1}\right)^{-1}\ ?$$ . From $$\left(x^{-1}+y^{-1}\right)^{-1}\ >\left(x^{-1}\cdot y^{-1}\right)^{-1}\ ?$$ , we have 1/(1/x + 1/y) > 1/(1/xy) xy/(x + y) > xy We cannot cancel xy from both the ...” January 7, 2019 Jay@ManhattanReview posted a reply to Is x^2 + 9 prime? in the Data Sufficiency forum “Let''s take each statement one by one. (1) x is odd So, we have x^2 + 9 => (Odd)^2 + 9 => Odd + Odd = Even > 9. Note that all prime numbers greater than 2 are odd, thus, x^2 + 9 is not a prime number. Sufficient. (2) 3 ≤ x ≤ 7 We must not assume that x is an integer and ...” January 7, 2019 Jay@ManhattanReview posted a reply to If a/b > 4, is a > 8? in the Data Sufficiency forum “Given: a/b > 4 We have to determine whether a > 8. Let''s take each statement one by one. (1) b > 2 Given b > 2 means that b is positive, thus, we can multiply b to both the sides of a/b > 4. Thus, we have a/b > 4 => (a/b)*b > 4*b => a > 4b. Say b = ...” January 7, 2019 Jay@ManhattanReview posted a reply to If a total of 84 students are enrolled in two sections of a in the Data Sufficiency forum “Say there are x numbers of males students; thus, there are 84 – x numbers of female students. We have to get the value of 84 – x. Let''s take each statement one by one. 1) 2/3 of the students in Section 1 are female. We don''t know about this information for Section 2. Insufficient. ...” January 7, 2019 Jay@ManhattanReview posted a reply to Each of the 105 students in a certain club is either a in the Data Sufficiency forum “From the two statements, we know that the ratio of the number of freshmen to the number of sophomores to the number of juniors is 1 : 2 : 4 On ratio scale the total number of students = 1 + 2 + 4 = 7. Thus, the number of sophomores = 2*(105/7) = 30. Sufficient. The correct answer: C ...” January 7, 2019 Jay@ManhattanReview posted a reply to If the operation # is one of the four arithmetic operations in the Data Sufficiency forum “Let''s take each statement one by one. (1) 3#2 > 3 Say # is: 1. Addition: Thus, 3#2 > 3 => 3+2 > 3 => 5 > 3. Thus, # can be addition. 2. Subtraction: Thus, 3#2 > 3 => 3–2 > 3 => 1 < 3. Thus, # cannot be subtraction. 3. Multiplication: Thus, 3#2 > 3 ...” January 7, 2019 Jay@ManhattanReview posted a reply to A barn is enclosed in the shape of a 6-sided figure; all in the Data Sufficiency forum “Given that the 6-sided figure has sides of the same length and have the same angle, the figure is a regular hexagon. Note that each interior angle of a hexagon is 120º and the simply by knowing the side or diagonal of the hexagon, we can compute its area. Thus, each statement by itself is ...” January 5, 2019 Jay@ManhattanReview posted a reply to Machine M and Machine N working alone at their constant rate in the Data Sufficiency forum “Say Machine M works for x hours and Machine N works for y hours. We have to determine whether x > y. Let''s take each statement one by one. 1) Machine N produces 2000 more nails than machine M in one hour when each machine work at its constant rate. => 2000 = 8000/y – 6000/x 1 ...” January 5, 2019 Jay@ManhattanReview posted a reply to A store sells erasers for 0.23$ per piece and pencil for in the Data Sufficiency forum
“Say Jessica bought x numbers of erasers and y x numbers of pencils. Thus, she spent a total of 0.23x + 0.11y to buy (x + y) items. We have to get the value of (x + y). Let''s take each statement one by one. 1) She bought 5 erasers. No information about the numbers of pencils. ...”
January 5, 2019
Jay@ManhattanReview posted a reply to Of the 800 sweaters in a certain store, 150 are red. How in the Data Sufficiency forum
“Pl. refer to this self-explanatory image. https://i.postimg.cc/gxtP6r12/Picture1.png The correct answer: B Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review New Delhi | GMAT Prep Malleswaram | GRE Prep Vijayawada | Mumbai GRE Coaching | and many ...”
January 4, 2019
Jay@ManhattanReview posted a reply to Jim and Nancy each provide the same service at a different in the Data Sufficiency forum
“Say the original prices for Jim and Nancy are J and N, respectively. We have to determine whether Nancy’s discount price is less than Jim’s discount price. 1) Jim’s discount price is 20 percent less than his original price and Nancy’s discount price is 30 percent less than her original ...”
January 4, 2019
Jay@ManhattanReview posted a reply to Does Country X have more citizens than Country Y? in the Data Sufficiency forum
“Say Country X has X numbers of citizens and Country Y has Y numbers of citizens. We have to determine whether X > Y. Let''s take each statement one by one. 1) 60% of Country X''s citizens are also citizens of Country Y. The number of citizens of both the countries = 60% of X = 0.6X. ...”
January 4, 2019
Jay@ManhattanReview posted a reply to If n is a positive integer, is n the square of an integer? in the Data Sufficiency forum
“Given: n is a positive integer. We have to determine whether n the square of an integer or a perfect square number. Let''s take each statement one by one. (1) |n – 5m| = 2 for some integer m. => n – 5m = 2 or n – 5m = –2 Taking n – 5m = 2, we get n = 2 + 5m, where m is ...”
January 4, 2019
Jay@ManhattanReview posted a reply to How many people contributed to the Charity Y ? in the Data Sufficiency forum
“Average contribution = Total contribution / Total number of people Thus, $100 = 47000/ Total number of people => Total number of people = 470. Sufficient. The correct answer: C Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review New Delhi | ...” January 4, 2019 Jay@ManhattanReview posted a reply to This morning, a certain sugar container was full. Since then in the Data Sufficiency forum “Say the container had 100 grams of sugar and x grams was removed. Thus, it has (100 – x) grams of sugar now. We have to get the value of x/(100 – x). Let''s take each statement one by one. 1) The amount of sugar in the container after making the cookies would need to be increased by 30 ...” January 3, 2019 Jay@ManhattanReview posted a reply to On a construction site, 16 of the men wear helmets, and 19 in the Data Sufficiency forum “Pl. see this self-explanatory image. https://i.postimg.cc/rdF10bCk/Helmate.png The correct answer: E Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Jayanagar | GMAT Prep Tarnaka | GRE Prep Madhapur | Kukatpally GRE Coaching | and many more... ...” January 3, 2019 Jay@ManhattanReview posted a reply to d = 0.43t7 If t denotes the thousandths digit in the decimal in the Data Sufficiency forum “Given that d = 0.43t7, we have to find out the value of t. Let''s take each statement one by one. (1) If d were rounded to the nearest hundredth, the result would be 0.44. We have d = 0.43t7, which is rounded to the nearest hundredth and its value is 0.44. Since the nearest hundredth is ...” January 3, 2019 Jay@ManhattanReview posted a reply to The employees of Smith Enterprises received wage increases in the Problem Solving forum “It''s clear that the maximum wage increase for a 40-hour week would be$40*(87.5/100) = $4*(7/8) =$35. The correct answer: D Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Himayatnagar | GMAT Prep Hyderabad | GRE Prep Bangalore | Chennai GRE ...”
January 2, 2019
Jay@ManhattanReview posted a reply to A department store receives a shipment of 1,000 shirts, for in the Problem Solving forum
“Cost of per shirt = 9000/1000 = $9; Price of a shirt in the first month = 9*(100 + 80)% = 9*1.8; Price of a shirt in subsequent months = 9*(100 + 20)% = 9*1.2; Number of shirts sold in the first month = 75% of 1000 = 750; Number of remaining shirts = 1000 – 750 = 250; Number of shirts sold in ...” January 2, 2019 Jay@ManhattanReview posted a reply to Of the 84 parents who attended a meeting at a school, 35 vol in the Problem Solving forum “Say, P = the number of parents who attended the meeting = 84; S = the number of parents who volunteered to supervise children = 35; R = the number of parents who volunteered to bring refreshments = 1.5N; B = the number of parents who volunteered to supervise children as well as bring ...” January 2, 2019 Jay@ManhattanReview posted a reply to If the ratio of the volumes of two right circular cylinders in the Problem Solving forum “Note that the volume (V) of a right circular cylinder is given by πr^2h, where r = radius of the cylinder and h = height So, V = πr^2h => Volume of proportional to the square of the radius, if height is constant Since it is given that the two cylinders have the same heights, their ...” January 2, 2019 Jay@ManhattanReview posted a reply to A person invested$500 each in two different schemes S1 and in the Data Sufficiency forum
“Let''s take each statement one by one. Say the $500 invested in scheme S1 attracts an interest of R% per annum and the$500 invested in scheme S2 attracts an interest of r% per annum. 1) At the beginning of year 2, S1 amounts to $525. => 525 – 500 =$25 is the interest for one year in ...”
January 1, 2019
Jay@ManhattanReview posted a reply to For a certain city's library, the average cost of purchasing in the Data Sufficiency forum
“Let''s take each statement one by one. (1) The library purchased an average of 50 new books each month last year and received enough money from the city to cover this cost. Funds needed to buy 600 (= 50*12) books = 600*$28 =$16,800 > $15,000. Thus, the library must have received the bonus. ...” January 1, 2019 Jay@ManhattanReview posted a reply to Brady, Charlie, and Daryl play on the same baseball team. Th in the Data Sufficiency forum “Say the number of home runs hit by Brady, Charlie, and Daryl are b, c, and d, respectively. We have to get the value of b/(b + c + d). Let''s take each statement one by one. (1) Brady hit 12 home runs in that season. We have b = 12, but we do not know the value of c and d. Insufficient. ...” January 1, 2019 Jay@ManhattanReview posted a reply to The average weight of the women in a room is 120 lbs, and th in the Data Sufficiency forum “Say there are x numbers of men and y numbers of women in the room. Thus, there are a total of x + y numbers of people in the room. Average weight of x + y people = (150x + 120y)/(x + y) Let''s take each statement one by one. (1) There are twice as many men as women in the room. => x = ...” January 1, 2019 Jay@ManhattanReview posted a reply to Is x + y > 0 ? (1) x - y > 0 (2) x^2 - y^2 > 0 in the Data Sufficiency forum “We have to determine whether x + y > 0. Let''s take each statement one by one. (1) x – y > 0 Case 1: Say x = 3 and y = 2, then x – y > 0 and x + y = 5 and x + y > 0. The answer is Yes. Case 2: Say x = –2 and y = –3, then x – y > 0 => –2 + 3 = 1 > 0 and x + ...” December 29, 2018 Jay@ManhattanReview posted a reply to In a certain senior class, 72 percent of the male students in the Data Sufficiency forum “Say there are x numbers of male students, y numbers of female students; thus, there are x + y numbers of students. Thus, the percent of the students in the senior class who have applied to college = 72% of x + 80% of y = 0.72x + 0.8y We have to get the value of x /(x + y). Let''s take each ...” December 29, 2018 Jay@ManhattanReview posted a reply to How many members of a certain country club play both squash in the Data Sufficiency forum “Say, the total members of the country club play either squash or racquetball = T; the total members of the country club play squash = S; the total members of the country club play racquetball = R; and the total members of the country club play both squash and racquetball = B Thus, we have ...” December 29, 2018 Jay@ManhattanReview posted a reply to If a certain positive integer is divided by 9, the remainder in the Data Sufficiency forum “Given that the positive integer divided by 9 leaves the remainder 3, we have the number = 9q + 3; where q = quotient. We have to determine the remainder when the integer 9q + 3 is divided by 5. Let''s take each statement one by one. 1) If the integer is divided by 45, the remainder is 30. ...” December 29, 2018 Jay@ManhattanReview posted a reply to A car drives along a straight road from Smithville to Laredo in the Data Sufficiency forum “Say the distance from Smithville to Laredo is x miles, the distance from Smithville to Ferristown is y miles, and the distance from Ferristown to Laredo is z miles. Thus, x = y + z. We have to get the value of x. Let''s take each statement one by one. 1) The distance from Smithville to ...” December 29, 2018 Jay@ManhattanReview posted a reply to Are at least 10 percent of the people in Country X who are in the Data Sufficiency forum “We have to determine whether at least 10 percent of the people in Country X who are 65 years old or older employed. Let''s take each statement one by one. 1) In Country X, 11.3% of the population is 65 years old or older. We have no information about the percent of the people in Country X ...” December 29, 2018 Jay@ManhattanReview posted a reply to The total cost of producing item X is equal to the sum of in the Data Sufficiency forum “Say before January, the fixed cost is$F and the variable cost is $V, and in January, the fixed cost is$F'' and the variable cost is $V''. Thus, Before January, Total cost T = F + V and After January, Total cost T'' = F'' + V'' = F'' + 95% of T = F'' + 0.95V We have to find out the value ...” December 28, 2018 Jay@ManhattanReview posted a reply to A wooden rod is cut into two pieces. What is the length of in the Data Sufficiency forum “Say the lengths of the two pieces are x and y inches such that x > y. We have to get the value of x. Let''s take each statement one by one. 1) One of the pieces is 20 inches longer than the other piece. x = y + 20. Insufficient. 2) The length of the shorter piece is 1/3 the length of ...” December 28, 2018 Jay@ManhattanReview posted a reply to In the figure above, a circle is inscribed in square WXYZ. W in the Data Sufficiency forum “Note that the radius of the circle is half of the side of the square and Side of the square is 1/√2 times the diagonal of the square. Also, note that the shortest distance between W and Y is the diagonal. So from Statement 1, we have diagonal = WY. Thus, we can have the value of side as well as ...” December 28, 2018 Jay@ManhattanReview posted a reply to Mark has fewer than 9 coins. Each coin is either a quarter in the Data Sufficiency forum “say Mark has x numbers of quarters and y numbers of dimes. Thus, we have 2 ≤ x + y < 9 We have to find out the value of y. Let''s take each statement one by one. 1) The total value of Mark''s coins is$1.70. 0.25x + 0.10y = 1.70 5x + 2y = 43 y = (34 – 5x)/2 y = 17 ...”
December 28, 2018
Jay@ManhattanReview posted a reply to Mark has fewer than 9 coins. Each coin is either a quarter in the Data Sufficiency forum
“say Mark has x numbers of quarters and y numbers of dimes. Thus, we have 2 ≤ x + y < 9 We have to find out the value of y. Let''s take each statement one by one. 1) The total value of Mark''s coins is $1.70. 0.25x + 0.10y = 1.70 5x + 2y = 43 y = (34 – 5x)/2 y = 17 ...” December 28, 2018 Jay@ManhattanReview posted a reply to What percentage of the current fourth graders at Liberation in the Data Sufficiency forum “Let''s take each statement one by one. 1) 60% of the current fourth graders at Liberation Elementary School dressed in costume for Halloween this year. Certainly insufficient. 2) Of the current fourth graders at Liberation Elementary School who did not dress in costume for Halloween this ...” December 28, 2018 Jay@ManhattanReview posted a reply to Last week, Raina and Bob made a combined total of 190 sales in the Data Sufficiency forum “Say the number of sales made by Raina is x, and the number of sales made by Bob is y. Thus, x + y = 190. We have to find out the value of x – y. Let''s take each statement one by one. 1) The difference between the number of sales Raina made and the number of sales Bob made was ten ...” December 28, 2018 Jay@ManhattanReview posted a reply to Last year, 'Crazy Matt's Electronics' earned 90% more than in the Data Sufficiency forum “Say, Sane Dan Plumbing'' last year earning =$x, thus, Crazy Matt''s Electronics'' last year earning = $1.9x. We have to find out whether Matt''s earnings this year higher than Dan''s last year''s earnings (= x). Let''s take each statement one by one. 1) Dan earned 735,123 dollars last ...” December 27, 2018 Jay@ManhattanReview posted a reply to On June 1, Mary paid Omar$360 for rent and utilities for in the Data Sufficiency forum
“Say the rent for the month of June is $X and charges for the utility per day is$y. Thus, we have Say Mary moves out after d days, where d < 30; we know that June is a 30 days month. We have to find out the value of $(30 – d)y. Let''s take each statement one by one. 1) Mary moves ...” December 27, 2018 Jay@ManhattanReview posted a reply to In 1990 850 million movie tickets were sold in the United in the Data Sufficiency forum “Given that a total 850M tickets were sold, the number of tickets bought by people over the age of 50 = 1/5 of 850 = 170M. We have to determine whether people under the age of 20 bought more than 425 million movie tickets in 1990. Let''s take each statement one by one. 1) In 1990, people ...” December 27, 2018 Jay@ManhattanReview posted a reply to In isosceles triangle RST what is the measure of angle R? in the Data Sufficiency forum “Let''s take each statement one by one. (1) The measure of angle T is 100 degrees. Case 1: Say angle S = angle R. Since angle T = 100, the sum of angle T and angle S = 180 – 100 = 80. This means that angle S = angle R = 40. Case 2: Say angle T = angle R = 100. But this case is not possible ...” December 27, 2018 Jay@ManhattanReview posted a reply to John and Fawn, each drinking at a constant pace, can finish in the Data Sufficiency forum “Say John alone takes x hours and Fawn takes y hours to finish a can. Thus, we have 1/x + 1/y = 1/12 We have to get the value of x. Let''s take each statement one by one. 1) The average time it would take both to finish independently is 30 hours. => (x + y)/2 = 30 => x + y = 60 ...” December 24, 2018 Jay@ManhattanReview posted a reply to What is the ratio of the number of cups of flour to the in the Data Sufficiency forum “Say the number of cups of flour and the number to the number of cups of sugar are F and S, respectively. We have to find out the value fo F/S. Let''s take each statement one by one. 1) The number of cups of flour required in the recipe is 250% of the number of cups of sugar required in the ...” December 24, 2018 Jay@ManhattanReview posted a reply to If Mary always takes the same route to work, how long did it in the Data Sufficiency forum “Say the distance to work is d miles and speed on Friday was s miles per minute. Thus, time taken to get to work on Friday = d/s minutes Let''s take each statement one by one. 1) It took Mary 20 minutes to get to work on Thursday. Time taken to get to work on Thursday = d/s'' = 20 ...” December 24, 2018 Jay@ManhattanReview posted a reply to Eco Wildlife Preserve contains 5x zebras and 2x lions, where in the Data Sufficiency forum “Current zebra to lion ratio: Z : L :: 5x : 2x The ratio after z numbers of zebras a killed by lions: Z'' : L. We have to determine whether Z'' : L is less than 1/2. Z'' : L :: (5x – z) : 2x < 1/2 = (5x – z) / 2x < 1/2 = 5/2 – z/2x < 1/2 = 5/2 – 1/2 < z/2x = ...” December 24, 2018 Jay@ManhattanReview posted a reply to If a certain parking lot contains 40 motors vehicles, how in the Data Sufficiency forum “See the following image which is self-explanatory. https://i.postimg.cc/2bHmtNgf/Truck.png The correct answer: E Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Hyderabad | GMAT Prep Bangalore | GRE Prep Chennai | Himayatnagar GRE Coaching | and ...” December 24, 2018 Jay@ManhattanReview posted a reply to Is the range of the integers 6, 3, y, 4, 5, and x greater in the Data Sufficiency forum “Excluding x and y, the range of the list 6, 3, y, 4, 5, and x is 6 – 3 = 3. We have to determine whether the range of the list is greater than 9. Let''s take each statement one by one. (1) y > 3x Case 1: Say x = 0, and y = 1, the range = 6 – 0 = 6 < 9. The answer is No. Case 2: ...” December 23, 2018 Jay@ManhattanReview posted a reply to A mixture of oil, water, and vinegar contains 10% oil. After in the Data Sufficiency forum “Let''s take each statement one by one. (1) Before the water evaporated, the mixture exactly filled a one liter bottle. => Oil = 10% of 1 liter = 100 ml., but we do not know how much water is evaporated. Insufficient. (2) Before the water evaporated, vinegar accounted for forty percent ...” December 20, 2018 Jay@ManhattanReview posted a reply to Before being simplified, the instructions for computing in the Problem Solving forum “Pl. find it here: https://www.beatthegmat.com/income-tax-t277997.html Hope this helps! -Jay _________________ Manhattan Review Locations: Manhattan Review Hyderabad | GMAT Prep Bangalore | GRE Prep Chennai | Himayatnagar GRE Coaching | and many more... Schedule your free consultation ...” December 20, 2018 Jay@ManhattanReview posted a reply to If sequence S has 120 terms, what is the 105th term of S? in the Data Sufficiency forum “Let''s take each statement one by one. (1) The first term of S is −8. Certainly insufficient as we do not know by what pattern the subsequent terms follow. (2) Each term of S after the first term is 10 more than the preceding term. Certainly insufficient. Though we know the pattern the ...” December 20, 2018 Jay@ManhattanReview posted a reply to Kevin deposited x hundred dollars in a bank that pays Y in the Problem Solving forum “Since the interest is compounded semi-annually, we have to consider the rate = Y/2 and period of compounding = 1*2 = 2 periods. The sum invested given = x hundred dollars =$ 100x The formula for compounding is A = P(1 + r/100)^n, where A = Amount, P = Principal = 100x, r = Rate of interest = ...”
December 19, 2018
Jay@ManhattanReview posted a reply to It takes 6 beavers 10 hours to build a certain dam, working in the Problem Solving forum
“Given, that it takes 6 beavers 10 hours to build a certain dam, we need 6*10 = 60 man-hours to complete the dam. Or, in 1 man-hour 1/60 dam is completed. From 12 noon to 6 pm, in 6 hours, 6 beavers worked or contributed 6*6 = 36 man-hours. This way, 36/60 = 3/5 part of the dam is completed and 1 ...”
December 19, 2018
Jay@ManhattanReview posted a reply to If 5 − 3x > 3, which of the following expresses the pos in the Problem Solving forum
“We have 5 − 3x > 3 Transferring –3x to the RHS and 3 to LHS, we have 5 – 3 > 3x => 2 > 3x => 2/3 > x. The correct answer: C Hope this helps! -Jay _________________ Manhattan Review Test Prep Locations: Manhattan Review Chennai | Free GMAT Practice Test | GRE ...”
December 19, 2018
Jay@ManhattanReview posted a reply to In the figure, the 6 small squares are identical, each with in the Problem Solving forum
“Let''s convert the figure as below. https://i.postimg.cc/0KbdLz1j/Sqr.png The perimeter = 12. The correct answer: B Hope this helps! -Jay _________________ Manhattan Review Test Prep Locations: Manhattan Review Chennai | Free GMAT Practice Test | GRE Prep Hyderabad | Jayanagar ...”
December 19, 2018
Jay@ManhattanReview posted a reply to Jason deposits money at a bank on a Tuesday and returns to in the Problem Solving forum
“Note that after 7 days, we land on the same day, so we have to count how many complete 7-days are there in 100 days. 100 divided by 7 leaves a quotient of 14 and 2 the remainder. So, we must count 2 days from Tuesday. Two days from Tuesday is Thursday. The correct answer: D Hope this ...”
December 19, 2018
Jay@ManhattanReview posted a reply to When n is a positive integer, is n / 4 an integer? in the Data Sufficiency forum
“For n/4 to be an integer, n must be divisible by 4. Let''s take each statement one by one. 1) n – 1 is not divisible by 2. Since n and n – 1 are consecutive integer and n – 1 is not divisible by 2, it means that n is divisible by 2. Note that every second number is even, thus, ...”
December 18, 2018
Jay@ManhattanReview posted a reply to Harry and Ron work for the same company but earn different in the Data Sufficiency forum
“Say, Harry''s income and expenditures are x, and y, respectively. And Ron''s income and expenditures are p, and q, respectively. Harry''s saving = x – y and his proportion of saving = (x – y)/x = 1 – y/x. Ron''s saving = p – q and his proportion of saving = (p – q)/p = 1 – q/p. ...”
December 17, 2018
Jay@ManhattanReview posted a reply to If a certain culture of bacteria increases by a constant in the Data Sufficiency forum
“Let''s take each statement one by one. 1) x = 10^y => 10,000 = 10^y => y = 4 minutes. Sufficient. 2) In two minutes, the culture will increase to one hundred times its original size. => Rate = 100^(1/2) = 10 times per minute Thus, for the culture to increase 10,000 times (= ...”
December 17, 2018
Jay@ManhattanReview posted a reply to A restaurant serves only tacos and enchiladas. If 60% of all in the Data Sufficiency forum
“Say those who ordered tacos = T = 60%, those who ordered enchiladas = E and those who ordered both tacos and enchiladas = B Thus, we have 100 = T + E – B 100 = 60 + E – B E = 40 + B. We have to get the value of E. Let''s take each statement one by one. (1) Half of those who ...”
December 17, 2018
Jay@ManhattanReview posted a reply to A set consists of n consecutive integers in which the smalle in the Data Sufficiency forum
“Let''s take each statement one by one. (1) When one of the numbers is removed from the set, the average of the remaining numbers in the set is 15. Say the number removed is x. Thus, x + sum of the remaining (n – 1) numbers = Sum of n numbers => x + 15(x – 1) = n(n + 1)/2 2x = ...”
December 17, 2018
Jay@ManhattanReview posted a reply to If a, b & c are integers, is abc odd? in the Data Sufficiency forum
“For abc to be odd, each of a, b and c must be odd. Even if only one of then is even, abc is even. Question rephrased: Is each of a, b and c odd? (1) ab is odd. c and be even or odd, making abc even or odd. Insufficient. (2) bc is odd. a and be even or odd, making abc even or odd. ...”
December 17, 2018
Jay@ManhattanReview posted a reply to At the beginning of the year, the Finance Committee and the in the Data Sufficiency forum
“We know that the number of members in the finance committee and in planning committee are n, each. At the end of the year, the number of members in the finance committee and in planning committee would be (n – 5) and( n – 3), respectively. We have to determine how many members did the ...”
December 14, 2018
Jay@ManhattanReview posted a reply to Did Jeff record more sales revenue this month than Dan did? in the Data Sufficiency forum
“Another approach: We need to determine whether Jeff recorded more sales revenue this month than Dan. Say Jeff''s sales revenue = $J and Dan''s sales revenue =$D. Question: Is J > D? Let''s take each statement one by one. We already know that each statement alone is not sufficient. ...”
December 14, 2018
Jay@ManhattanReview posted a reply to Did Jeff record more sales revenue this month than Dan did? in the Data Sufficiency forum
“We need to determine whether Jeff recorded more sales revenue this month than Dan. Let''s take each statement one by one. 1) Jeff earned 20% more in sales commissions this month than Dan did. Given that Jeff earned 20% more in sales commissions this month than Dan did does not mean that ...”
December 14, 2018
Jay@ManhattanReview posted a reply to How many 4-letter words can be formed using the alphabets of in the Problem Solving forum
“The word ENGLISH has 7 alphabets with no alphabet being repeated. Since the two alphabets, G and L are already chosen, we are left with only two alphabets to be chosen. The number of ways to select two alphabets = 5C2 = 5.4 / 1.2 = 10 Let club G and L as one alphabet. So, we have three ...”
December 12, 2018
Jay@ManhattanReview posted a reply to A car overtakes a goods train, wich is 400 m long and in the Problem Solving forum
“We must assume that the length of the car is negligible. Say the speed of the car is x kmph. Since it is given that the car overtakes the first goods train, the relative speed of the car = x – 36 Time taken to overtake the goods train = (400/1000) / (x – 36) = 8/3600 x = 216 kmph ...”
December 12, 2018
Jay@ManhattanReview posted a reply to Machines A, B and C produce identical balls at their in the Data Sufficiency forum
“Say Machines A, B and C, working individually, produce the same batch of balls in a, b, and c hours. Given that machines A and B operating simultaneously can produce a batch of balls in 4 hours and 48 minutes = 24/5 hours Thus, as per the information, we have, 1/a + 1/b = 1/(24/5) => ...”
December 12, 2018
Jay@ManhattanReview posted a reply to Of the N books on a table, some are English and the rest are in the Data Sufficiency forum
“Say the there are x numbers of English books; thus, there are N – x numbers of Bangla books. We have to get the value of N. Let''s take each statement one by one. 1) If 1 English book was removed from the N books, 1/5 of the remaining books would be English. => Numbers of English ...”
December 12, 2018
Jay@ManhattanReview posted a reply to Each person attending a fund-raising party for a certain clu in the Data Sufficiency forum
“The question is not transcripted correctly. In Statement 2, ''more'' should be there for ''less.'' Say the admission fee is $x per person and n number of people attended the party. Thus, total admission fee =$xn We have to get the value of n. Let''s take each statement one by one. ...”
December 11, 2018
Jay@ManhattanReview posted a reply to If x and y are positive integers and in the Data Sufficiency forum
“Given that x and y are positive integers and y = √(5 – x), we must 1 ≤ x ≤ 4 such that (5 – x) is a perfect square. Only two values of x qualify for the corresponding qualifying values of y. 1: x = 1 and y = 4; and 2: x = 4 and y = 1. Let''s take each statement one by one. 1) x > ...”
December 11, 2018
Jay@ManhattanReview posted a reply to The ratio of the marked price to the cost price of a mobile in the Problem Solving forum
“Hi, What is the source of the question? It does not seem to be a GMAT question. GMAT does not have ''can not be determined'' option; moreover, it is not transcripted well. -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Warangal | Hyderabad | GRE Prep ...”
December 11, 2018
Jay@ManhattanReview posted a reply to If the ratio of the present age of Anna and Paula is 1 : 2, in the Problem Solving forum
“Say the present age of Anna and Paula are x and 2x, respectively. Thus, their ages 8 years ago would be (x – 8) and (2x – 8), respectively. Thus, the ratio of their ages after 8 years would be (x – 8) : (2x – 8). Note that x is a positive integer and is greater than 8. Note that ...”
December 11, 2018
Jay@ManhattanReview posted a reply to Tom drives from town A to town B, driving at a constant spee in the Problem Solving forum
“A -------------(60 mph)----------2d miles ------------B-----(x mph)-----d miles ------C Given the average speed from A to C = 36, we have Time take to cover the distance from A to C = (2d + d)/36 = d/12 hours Time take to cover the distance from A to B = (2d)/60 = d/30 hours Time take to ...”
December 10, 2018
Jay@ManhattanReview posted a reply to In the figure above, acr QRO is a semicircle. What is the in the Data Sufficiency forum
“We have to get the area of the circle with center O. Let''s take each statement one by one. 1) The area of the triangle PQO is 30. 1/2 * OP * OQ = 30 => R*2r = 60 => R*r = 30, wether OP = R = radius of the bigger circle and r = radius of the smaller circle We know that the area of ...”
December 10, 2018
Jay@ManhattanReview posted a reply to The sequence a(1), a(2), a(3), ... a(n) of n integers is suc in the Data Sufficiency forum
“From the given information, we have a(1) = 1; a(2) = –a(1) = –1; a(3) = 3; a(4) = –a(3) = –3; a(5) = 5; a(6) = –a(5) = –5 ... We see that if the number terms is even, the sum of the terms = 0. Take for example, the sum of 1 + (–1) + 3 + (–3) = 0. However, if the number ...”
December 10, 2018
Jay@ManhattanReview posted a reply to At what speed was Erik running when he was at the halfway po in the Data Sufficiency forum
“We are asked to find out Erik''s speed when he was at the halfway point of his route. Note that his speed may vary through his route many times. Let''s take each statement one by one. 1. Erik''s route was 10 miles long and took him 2 hours to complete. From this data, we can compute Erik''s ...”
December 10, 2018
Jay@ManhattanReview posted a reply to Line DB divides Rectangle ABCD into two equal triangles. Is in the Data Sufficiency forum
“Needless to say that each statement alone is not sufficient. Combining both the statements: Case 1: Say AB = 1 and AD = 2, then we have /_A = 90º, and angle B can be determined. Let''s not calculate it as of now. Case 2: Say DB = 2 and AD = 1, then we have /_A = 90º, and angle B can be ...”
December 10, 2018
Jay@ManhattanReview posted a reply to Is the perimeter of triangle ABC greater than 12 cm? in the Data Sufficiency forum
“Say the three sides are a, b and c. Thus, perimeter = a + b + c. We have to ascertain whether a + b + c > 12. Let''s take each statement one by one. 1) One side of triangle ABC measures 6 cm. Note that the sum of any two sides is greater than the third side. Say a = 6, thus, b ...”
December 10, 2018
Jay@ManhattanReview posted a reply to Three photographers, Lisa, Mike and Norm, take photos of a w in the Problem Solving forum
“Say the number of photos Lisa, Mike and Norm, take are L, M, and N, respectively. Given the total of Lisa and Mikes photos is 50 less than the sum of Mike''s and Norms, we have L + M = M + N – 50 L = N – 50 ---(1) Given Norms photos number 10 more than twice the number of Lisa''s ...”
December 9, 2018
Jay@ManhattanReview posted a reply to When the positive number a is rounded to the nearest tenth, in the Data Sufficiency forum
“Say, a = x.yz, where x is units'' digit, y is tenth digit, and z is hundredth digit and b = x.p, where x is units'' digit, and p is tenth digit (p is either y or y + 1) We have to get the value of y. Let''s take each statement one by one. (1) When a is rounded to the nearest integer, ...”
December 8, 2018
Jay@ManhattanReview posted a reply to Which of the following equations is satisfied by x=1+√2? in the Problem Solving forum
“Since the options are quadratic equations and x = 1 + √2 is a linear equation, we must find a way to convert into a quadratic equation such that we have a term with x. So, we have x = 1 + √2 => x – 1 = √2 Squaring both the sides, we get (x – 1)^2 = (√2)^2 x^2 – 2x + 1 ...”
December 7, 2018
Jay@ManhattanReview posted a reply to Sofia will attend a sequence of daily training sessions for in the Data Sufficiency forum
“As per the information: Say she has 7 days of training sessions: Thus, the order of the number of sessions would be 2, 2, 2, 2, 2, 2, (1 or 2) The number of left to be attended at the end of her third day = 2 + 2 + 2 + (1 or 2) = 7 or 8 So, the answer would depend on two information: 1. ...”
December 7, 2018
Jay@ManhattanReview posted a reply to In Jefferson School, 300 students study French or Spanish or in the Data Sufficiency forum
“Say # of students who study only French = F; # of students who study only Spanish = S; # of students who study both French and Spanish = B Thus, we have 300 = F + B + S Given that 100 of these students do not study French, we have S = 100. Thus, from 300 = F + B + S, we have F + B ...”
December 7, 2018
Jay@ManhattanReview posted a reply to In a certain game only one player can win and only one playe in the Data Sufficiency forum
“Probability that Katelyn wins at least one of the 3 games = 1 – (Probability that Katelyn loses all the 3 games) = 1 – (Probability that either James or Austin wins all the 3 games) Let''s take each statement one by one. (1) The probability that either James or Austin wins the game ...”
December 7, 2018
Jay@ManhattanReview posted a reply to If w, x, and y are consecutive odd positive integers and w & in the Problem Solving forum
“An odd positive integer can be represented as 2x + 1, where x is a non-negative integer Thus, we have w = 2x + 1; x = 2x + 3; and y = 2x + 5 Thus, y – x – w = 2x + 5 – 2x – 3 – 2x – 1 = 1 – 2x y – x – w = 1 – 2x We may plug-in x = 0, 1, 2, 3, etc. in 1 – 2x to ...”
December 5, 2018
Jay@ManhattanReview posted a reply to In a certain company, 25% of the women and 17% of the men in the Data Sufficiency forum
“Given there are M numbers of male employees, we have (600 – M) numbers of female employees. Thus, total number of employees who participated in the program = 17% of M + 25% of (600 – M) = 0.17M + 150 – 0.25M = 150 – 0.08M We have to get the value of M. Let''s take each ...”
December 5, 2018
Jay@ManhattanReview posted a reply to If a, b, and c are positive integers, what is the remainder in the Data Sufficiency forum
“Note that each statement alone is not sufficient, so taking both the statements together. We have to find out the remainder when a – b is divided by 6. a – b = c^3 – (c – 2)^3 = c^3 – C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan ...”
December 5, 2018
Jay@ManhattanReview posted a reply to An animal shelter began the day Tuesday with a ratio of 5 ca in the Data Sufficiency forum
“It was already asked by you only. Pl. see here: https://www.beatthegmat.com/an-animal-shelter-began-the-day-tuesday-with-a-ratio-of-5-t303993.html Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Mumbai | Hyderabad | GRE Prep Warangal | ...”
December 5, 2018
Jay@ManhattanReview posted a reply to Is quadrilateral ABCD a square? in the Data Sufficiency forum
“Question: Is quadrilateral ABCD a square? Let''s take each statement one by one. (1) A = B = C = 90º A quadrilateral has four angles. Since each of the three angles is equal to 90º, we have the fourth angle /_D = 90º A quadrilateral having four equal angles can be either a rectangle ...”
December 4, 2018
Jay@ManhattanReview posted a reply to If n is a positive integer, which of the following could be in the Problem Solving forum
“Among the five options, we have to find out the possible value of (n+1)^3 – n^3. So, we have (n+1)^3 – n^3 = n^3 + 3n(n + 1) + 1 – n^3 = C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Mumbai | Hyderabad | GRE Prep Warangal | ...”
December 4, 2018
Jay@ManhattanReview posted a reply to Is x + 1/x > 2? in the Data Sufficiency forum
“For x + 1/x to be greater than 2, x must be a positive number. We have x + 1/x > 2 => (x^2 + 1)/x > 2 => x^2 + 1 > 2x => x^2 – 2x + 1 > 0 => (x – 1)^2 > 0 We see that except for x = 1, (x – 1)^2 is a positive number. Thus, x ≠ 1. So, two conditions ...”
December 4, 2018
Jay@ManhattanReview posted a reply to If s and t are two different numbers on the number line, is in the Data Sufficiency forum
“Given: s and t are two different numbers on the number line. => s ≠ t Question: Is s + t = 0 ? Let''s take each statement one by one. (1) Distance between s and 0 is the same as distance between t and 0. There can be two possibilities: 1. s = t; however, this is not possible ...”
December 4, 2018
Jay@ManhattanReview posted a reply to Between the first day of May and last day in June, the price in the Problem Solving forum
“Say, At the begging of the first day of May, the prices of Melange and Blue were $x and$y, respectively. Price of Melange at the end of June: 1. When the price decreased: new price = x – 20% of x = 0.8x; 2. When the price increased: new price = 0.8x + 50% of 0.8x = 1.2x Price of Blue ...”
December 3, 2018
Jay@ManhattanReview posted a reply to If 320 people attended the wedding and 200 attendees drank in the Data Sufficiency forum
“Say, T = Total number of people who attended the wedding = 320; W = Total number of people who drank ONLY wine; R = Total number of people who drank ONLY beer; B = Total number of people who drank beer as well as wine; N = Total number of people who drank neither beer nor wine => T = W ...”
December 3, 2018
Jay@ManhattanReview posted a reply to The point A, B, C, and D are on the number line, not in the Data Sufficiency forum
“Let''s take each statement one by one. (1) The distance between C and A is the same as the distance between C and B. Case 1: A-----------9-----------C-----------8---------D--1--B; BD = 1 Case 2: A--1--D----------8-----------C-----------9---------B; BD = 17 No unique value of BD. ...”
December 3, 2018
Jay@ManhattanReview posted a reply to Last Friday a certain shop sold 3/4 of the sweaters in its in the Data Sufficiency forum
“Say the inventory of sweaters in the shop on last Friday was x, thus 3x/4 numbers of sweaters were sold. Total revenue last Friday from the sale of this sweaters = 3x/4 * 20 = 15x. If we get the value of x, we get the answer. Question rephrased: What''s the value of x, the inventory of ...”
December 3, 2018
Jay@ManhattanReview posted a reply to Is the positive integer p a multiple of 50? in the Data Sufficiency forum
“Question: Is the positive integer p a multiple of 50? Let''s take each statement one by one. (1) p is a multiple of 10. Case 1: If p = 50, the answer is Yes. Case 2: If p = 10, the answer is No. No unique answer. Insufficient. (2) p is a multiple of 5. Case 1: If p = 50, the ...”
December 2, 2018
Jay@ManhattanReview posted a reply to If x is a positive integer, is x a prime integer? in the Data Sufficiency forum
“Given: x is a positive integer. Question: Is x a prime integer? Let''s take each statement one by one. (1) x + 1 is a prime number. Case 1: Say x = 1 (non-prime), then x + 1 = 2 is a prime number. The answer is No. Case 2: Say x = 2 (Prime), then x + 1 = 3 is a prime number. The answer ...”
December 2, 2018
Jay@ManhattanReview posted a reply to A certain bookstore, each notepad costs x dollars and each in the Data Sufficiency forum
“We have 5x + 3y ≤ 10. We have to determine whether 4x + 4y ≤ 10 or x + y ≤ 2.5 Question: Is x + y ≤ 2.5? When we sacrifice x for y in the inequality 5x + 3y ≤ 10, we get 4x + 4y ≤ 10. Thus, for the inequality 4x + 4y ≤ 10 to be true, we must have x ≥ y; otherwise, we cannot ...”
December 2, 2018
Jay@ManhattanReview posted a reply to At a graduation ceremony, some students earned bachelors in in the Data Sufficiency forum
“Say, # of students who earned degrees in Art and Science = T = 200; # of students who earned degree ONLY in Science = S; # of students who earned degree ONLY in Arts = A; # of students who earned degree in both Art and Science = B => # of students who earned degree in Science = S + B ...”
December 2, 2018
Jay@ManhattanReview posted a reply to A box contains red and blue balls only. If there are 8 balls in the Data Sufficiency forum
“Let''s take each statement one by one. Say there are n red balls; thus, there are (8 – n) blue balls. We have to find out the value of n. 1) If two balls are randomly selected without replacement, the probability that both balls are red is 5/14. => n/8 * (n – 1)/7 = 5/14 n(n – ...”
November 29, 2018
Jay@ManhattanReview posted a reply to Eight consecutive integers are selected from the integers 1 in the Data Sufficiency forum
“Say, the eight consecutive integers are n, (n + 1), (n + 2), (n + 3), (n + 4), (n + 5), (n + 6), (n + 7), where n + 7 ≤ 50 We have to get the sum when the eight consecutive integers are divided by x. Let''s take each statement one by one. 1) The remainder when the largest of the ...”
November 29, 2018
Jay@ManhattanReview posted a reply to If n is a positive integer, is √17n an integer? in the Data Sufficiency forum
“Given: n is a positive integer. We have to determine whether √17n an integer. √(17n) would be an integer is n = 17m^2, where m is a positive integer Question: Is n = 17m^2, where m is a positive integer? Let''s take each statement one by one. 1) 68n is the square of an integer. ...”
November 29, 2018
Jay@ManhattanReview posted a reply to If 25% of the employees at a firm did not take a vacation in the Data Sufficiency forum
“Let''s take each statement one by one. (1) Only 1 out of every 3 employees who took a vacation last year received a promotion. Pl. refer to the following image. https://i.postimg.cc/LJcYfqCR/Stat1.png (2) The number of employees who took a vacation but did not get a promotion was 500% of ...”
November 29, 2018
Jay@ManhattanReview posted a reply to Of the 4,800 voters who voted for or against Resolution K, in the Data Sufficiency forum
“We have # of Dems voted (For + Against) = 1800; # of Reps voted (For + Against) = 3000 Question: What was the total number of female voters who voted for? Let''s take each statement one by one. 1) 3/4 of the Democrats and 2/3 of the Republicans voted for resolution K. # of Dems ...”
November 28, 2018
Jay@ManhattanReview posted a reply to Is triangle ABC obtuse angled? in the Data Sufficiency forum
“Question: Is triangle ABC obtuse angled? Let''s take each statement one by one. (1) a^2 + b^2 > c^2 Case 1: Say an obtuse-angled triangle has sides: a = c = 2 and b = 3. Since for a right-angled triangle, the hypotenuse would be 2√2 and b = 3 > 2√2, the triangle with sides 2, 2, ...”
November 28, 2018
Jay@ManhattanReview posted a reply to What is the value of (2^x + 2^x)/2^y ? in the Data Sufficiency forum
“(2^x + 2^x)/2^y = 2*2^x /2^y = 2^(x – 1)/2^y = 2^(x – y +1) If we get the value of x and y or (x – y), we get the answer. Let''s take each statement one by one. (1) x – y = 8 Sufficient. We have the value of x – y. (2) x/y = –3 Can''t get the unique values of x and y. ...”
November 28, 2018
Jay@ManhattanReview posted a reply to A company accountant estimates that airfares next year for in the Problem Solving forum
“Total spending next year = 9900 + 20% of 9900 + 13000 + 10% of 13000 = 120% of 9900 + 110% of 13000 < ~ 1.2*10000 + 1.1*13000 < ~ 12000 + 14300 < ~26300 The current answer must be less than $26300. The closest to$26300 is $26180. Note that$22,830 is way too less than 26300. The ...”
November 28, 2018
Jay@ManhattanReview posted a reply to In the xy-coordinate system, rectangle ABCD is inscribed in the Problem Solving forum
“Pl. see the image which is self-explanatory. https://i.postimg.cc/WF2FT1TV/Circel.png Given that the equation of the circle is x^2 + y^2 = 25, we have the radius of the circle = √25 = 5 and the coordinate of the center of the circle = (0, 0). Thus, AC = diameter = 10. Area of the ...”
November 27, 2018
Jay@ManhattanReview posted a reply to For any integers a, b, c, and d, sechigh(a, b, c, d) is the in the Data Sufficiency forum
“Given: sechigh(a, b, c, d) is the second highest integer when the integers are placed in an ordered list For example 1. sechigh(2, 5, 4, 6) = sechigh(2, 4, 5, 6) = 5 2. sechigh(6, 5, 3, 6) = sechigh(3, 5, 6, 6) = 6 We have to determine the value of sechigh(6, 7, 11, y). Question: We ...”
November 27, 2018
Jay@ManhattanReview posted a reply to Is b even? in the Data Sufficiency forum
“Let''s take each statement one by one. (1) a/b is even. Note that Even/Even and Even by Odd can be even. Case 1: Say a = 4 and b = 2 (even), then a/b = 4/2 = 2 (even); the answer is Yes. Case 2: Say a = 6 and b = 3 (odd), then a/b = 6/3 = 2 (even); the answer is No. No unique answer. ...”
November 27, 2018
Jay@ManhattanReview posted a reply to If x and y are integers and 2 < x < y, does y = 16 ? in the Data Sufficiency forum
“Let''s take each statement one by one. (1) The GCF of X and Y is 2. Case 1: Say x = 2 and y = 16; we have GCF of x and y = 2, and y = 16. The answer is Yes. Case 2: Say x = 2 and y = 32; we have GCF of x and y = 2, and y ≠ 16. The answer is No. No unique answer.Insufficient. (2) The ...”
November 27, 2018
Jay@ManhattanReview posted a reply to Is x^3-4x>0？ in the Data Sufficiency forum
“We have x^3 – 4x > 0 => Is x^3 > 4x? Note that we cannot cancel x from both the sides since we do not know whether x is positive. Let''s take each statement one by one. 1) x > 2 Note that at x = 2, we have x^3 = 4x => 2^3 = 2^3. As x takes up greater than 2 values, LHS ...”
November 25, 2018
Jay@ManhattanReview posted a reply to If Juan had a doctor's appointment on a certain day, was the in the Data Sufficiency forum
“Let''s take each statement one by one. (1) Exactly 60 hours before the appointment, it was Monday. 60 hours means 2.5 days. Case 1: Say 60 hours before the appointment is Monday 12:00 am (End of Sunday and Start of Monday) Thus, Monday 12:00 am + 2.5 days = Wednesday 12:00 pm (Wednesday ...”
November 25, 2018
Jay@ManhattanReview posted a reply to If x and y are nonnegative integers, what is the value of y? in the Data Sufficiency forum
“Given x and y are nonnegative integers, we have x: {0, 1, 2, 3, ...} and y: {0, 1, 2, 3, ...} Question: What is the value of y? Let''s take each statement one by one. (1) 3^x = 5^y Given x and y are integers, the only value possible for x and y for 3^x = 5^y to be true is x = y = 0. ...”
November 25, 2018
Jay@ManhattanReview posted a reply to The Coen family consists of a father, a mother, two children in the Problem Solving forum
“Since the father insists of standing by his woman, let''s consider them as one unit. So, there are 4 members now (Father-Mother), 2 children and a dog. The number of ways, 4 members can stand in a row = 4! = 24 Note that upon considering that the father insists of standing by his woman, we did ...”
November 24, 2018
Jay@ManhattanReview posted a reply to Twelve identical machines, running continuously at the same in the Problem Solving forum
“It is given that currently, 12 machines complete the work in 8 days and we want the work to be completed within 8 – 2 = 6 days. Since the number of days are reduced by a factor 6/8 = 3/4, we need a greater number of machines, i.e., a total of 12*(4/3) = 16 machines. Thus, the number of ...”
November 24, 2018
Jay@ManhattanReview posted a reply to Every object in a box is either a sphere or a cube, and ever in the Data Sufficiency forum
“This one is already answered. Pl. see here https://www.beatthegmat.com/every-object-in-a-box-is-either-a-sphere-or-a-cube-t295878.html -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Dilsukhnagar | Hyderabad GMAT Prep | Bangalore GMAT Courses | Kukatpally GRE ...”
November 24, 2018
Jay@ManhattanReview posted a reply to Rasheed bought two kinds of candy bars, chocolate and toffee in the Data Sufficiency forum
“Say Rasheed bought C numbers of chocolate bars and T numbers of toffee bars. We have to find out the value of C. Let''s take each statement one by one. (1) Rasheed bought 1 fewer package of chocolate bars than toffee bars. C = T – 1 ---(1) Can''t get the value of C. Insufficient. ...”
November 24, 2018
Jay@ManhattanReview posted a reply to A retailer sells only radios and clocks. If she currently in the Problem Solving forum
“Say there are x radios and y clocks. Thus, we have x + y = 44. We have to get the value of x. Let''s take each statement one by one. 1) The retailer has more than 28 radios in inventory. x > 28. But we can''t get the unique value of x. Insufficient. 2) The retailer has less than ...”
November 23, 2018
Jay@ManhattanReview posted a reply to In the figure above, lines k1 and k2 are parallel to each in the Problem Solving forum
“In the triangle enclosed by angles x, y and z, we have angles: (180 – x), y, and (180 – z). Thus, the sum of all the three angles of the triangle = (180 – x) + y + (180 – z) = 180 => x + y + z = 180. Question: What''s the value of x? Let''s take each statement one by one. ...”
November 23, 2018
Jay@ManhattanReview posted a reply to Company X has exactly two product lines and no other sources in the Data Sufficiency forum
“Say consumer product line revenue = $x and machine parts line revenue =$y Thus, increase or decrease in revenue = k% of x – k% of y = k% of (x – y) If x > y or x < y, the answer is Yes. If x = y, the answer is No. Question rephrase: Is x = y? Let''s take each statement one by ...”
November 23, 2018
Jay@ManhattanReview posted a reply to A drawer contains 12 socks, of which 8 are black and 4 are in the Data Sufficiency forum
“Let''s take each statement one by one. (1) The socks that remain in the drawer have a ratio of 2 black to 1 white. Say the out of the 3 removed socks, x were black, thus, (3 – x) were white. Number of black socks (now) = 8 – x; Number of white socks (now) = 4 – (3– x) = 1 + x; ...”
November 23, 2018
Jay@ManhattanReview posted a reply to The figure above represents the floor plan of an art gallery in the Data Sufficiency forum
“The figure above represents the floor plan of an art gallery that has a lobby and 18 rooms. If Lisa goes from the lobby into room A at the same time that Paul goes from the lobby into room R, and each goes through all of the rooms in succession, entering by one door and exiting by the other, which ...”
November 23, 2018
Jay@ManhattanReview posted a reply to Six countries in a certain region sent a total of 75 in the Data Sufficiency forum
“Given: > Total number of reps from 6 countries = 75; > Country A sent the second greatest number of reps Question: Did Country A send at least 10 reps? Let''s take each statement one by one. (1) One of the six countries sent 41 representatives to the Congress. Since 41 > ...”
November 22, 2018
Jay@ManhattanReview posted a reply to Currenty, there are 40 cars in each row of the lot at a car in the Data Sufficiency forum
“Say currently there are x number of rows, thus, 40x cars are parked. Say, after the new arrangement, there are y number of rows such that y < x (given), thus, 30y cars can be parked. We have 40x > 30y => 4x > 3y We have to get the value of 30y. Let''s take each statement one by ...”
November 22, 2018
Jay@ManhattanReview posted a reply to Every month, Harriet draws three paychecks from three jobs. in the Data Sufficiency forum
“Say the greatest paycheck is $x, and the other two paychecks are$y and $z, respectively. Tax on the greatest paycheck = 35% of x = 35%x; Tax on one of the smaller paycheck = 25% of y = 25%y; Tax on another of the smaller paycheck = 25% of z = 25%z We have to determine whether 35%x + 25%y ...” November 22, 2018 Jay@ManhattanReview posted a reply to interest in the Data Sufficiency forum “What''s the source of the question? It is not transcripted well. Also, pl. write the correct answer. Not to forget to mask it. We have the unique answer is, we get, one of the following as conclusion. 1. n > 4; the answer is yes. 2. n ≤ 4; the answer is no. Say n = 4. In n = 4 ...” November 22, 2018 Jay@ManhattanReview posted a reply to Which of the following is NOT a point on the circle of in the Problem Solving forum “Distance formula: Note that distance between two points whose coordinates are (x, y) and (a, b) is given by = √E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Madhapur | Hyderabad GMAT Prep | Bangalore GMAT Courses | Himayatnagar ...” November 22, 2018 Jay@ManhattanReview posted a reply to In a certain toy store, 20% of the international branded in the Problem Solving forum “For Premium category toys: 20% of the international branded toys = 10% of the total number of toys => International branded toys / Total number of toys = 10%/20% = 1/2 => International branded toys are 50% of the total number of toys. The correct answer: D Hope this helps! ...” November 21, 2018 Jay@ManhattanReview posted a reply to In the given diagram, the circle touches the y-axis at the in the Problem Solving forum “To get the area of the circle, we need the value of its radius. Since the circle touches Y-axis at point K, Y-axis would be a tangent to the circle and CK would be the radius. Thus, ∆OCK is a right-angled triangle with OK is its bases and CK is its altitude (height). Thus, area of ∆OCK ...” November 21, 2018 Jay@ManhattanReview posted a reply to A foot race will be held on Saturday. How many different in the Data Sufficiency forum “Certainly, each statement alone is not sufficient as in Statement 1, we do not know the number of runners and in Statement 2, we do not know the number of places. Combining the two statements works. > Number of ways the 1st place can be earned = 10; > Number of ways the 2nd place can ...” November 21, 2018 Jay@ManhattanReview posted a reply to If a store sold 30 more televisions this month than last in the Data Sufficiency forum “Percentage increase in the number of TVs sold this month over the last month is given by D Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Mehdipatnam | Hyderabad GMAT Prep | Bangalore GMAT Courses | Dilsukhnagar GRE Prep | and many ...” November 21, 2018 Jay@ManhattanReview posted a reply to In a certain two-digit integer, the ratio of the units in the Data Sufficiency forum “Given for the two-digit integer, the ratio of the units digit to the tens digit is 2 to 3, there are three possibilities. The number can be one of the following: 32; 64; and 96. Let''s take each statement one by one. 1) The tens digit is 3 more than the units digit. Only 96 qualifies. ...” November 20, 2018 Jay@ManhattanReview posted a reply to A number when divided by 4 and 5 leaves remainders 1 and 4 in the Problem Solving forum “Say the number is N, when N is divided by 4, the quotient is p and the remainder is 1, and when N is divided by 5, the quotient is q and the remainder is 4. Thus, N = 4p + 1 and N = 5q + 4 => 4p + 1 = 5q + 4 4p = 5q + 3 p = (5q + 3)/4 = 4q/4 + (q + 3)/4 = q + (q + 3)/4 Since p ...” November 20, 2018 Jay@ManhattanReview posted a reply to When sold at a 40% discount, a sweater nets the merchant a in the Problem Solving forum “Say the cost price =$x and the markup price = $y. After the discount of 40%, the selling price = (1 – 40%) of y = 0.6y Profit = 20% of x = 0.2x Thus, Selling price – Cost price = Profit 0.6y – x = 0.2x y = 2x y = 200% of x The sweater is marked up by 100% from wholesale ...” November 20, 2018 Jay@ManhattanReview posted a reply to A woman has seven cookies - four chocolate chip and three in the Problem Solving forum “Since there are 7 cookies and they are to be distributed among 6 friends, one cookie will be left. Let''s assume that the leftover cookie is eaten by the woman herself. She can eat of any type: Chocolate or Oatmeal. Case 1: Say Deborah and Kim eat Chocolate cookies. Thus, we have 2 Chocolate ...” November 20, 2018 Jay@ManhattanReview posted a reply to Fraction in the Problem Solving forum “Since we have to deal with 1/3 and 1/4, let''s consider that the revenue = 3*4 =$12 => Revenue from foreign clients = 1/3 of 12 = 4 => Remaining revenue = 12 – 4 = 8 => Revenue from out-of-state clients = 1/4 of 8 = 2 => Revenue from in-state clients = 8 – 2 = 6 Thus, ...”
November 19, 2018
Jay@ManhattanReview posted a reply to In the xy-plane, point O is located at the origin, point A in the Data Sufficiency forum
“Pl. see the image below, which is self-explanatory. https://i.postimg.cc/bdWRjvkx/Picture1.png https://i.postimg.cc/LnP34M3r/Picture2.png The correct answer: B Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Madhapur | Hyderabad ...”
November 19, 2018
Jay@ManhattanReview posted a reply to If Jay has 99 problems, in how many ways can he select k of in the Data Sufficiency forum
“We have to find out the value of 99Ck. If we know the unique value of k, we get the answer. Question: What''s the value of k? Let''s take each statement one by one. (1) Jay can select k+1 of his problems in 3764376 different ways. => 99C(k+1) = 3764376 Though this is a big number, it ...”
November 18, 2018
Jay@ManhattanReview posted a reply to Planning is in progress for a fenced, rectangular playground in the Problem Solving forum
“Say the length of the playground is a meters and the breath is b meters. Thus, Area = ab = 1600 (given) and Perimeter = 2(a + b) We have to minimize the value of (a + b), given that ab = 1600 (constant) Note that If the product of two numbers is a constant, their sum would be ...”
November 16, 2018
Jay@ManhattanReview posted a reply to Is |x|/x equal to -1? in the Data Sufficiency forum
“Looking at the fraction |x|/x, we see that the numerator |x| is a positive number, thus for |x|/x to be equal to –1, x must be negative. Let''s take each statement one by one. 1) x > 0 => x is positive. Thus, |x|/x equal to 1 ≠ –1. The answer is no. Unique answer. Sufficient. ...”
November 16, 2018
Jay@ManhattanReview posted a reply to Is the 5-digit positive integer abc000 divisible by 24? in the Data Sufficiency forum
“We have to ascertain whether abc000 is divisible by 24. Factors of 24 = 3*8 = 3*2^3 So, if abc000 is divisible by 24, it must be divisible by 3 as well as 2^3. Let''s first check the rule for the divisibility of a number by 3. A number is divisible by 3 if the sum of its digits is ...”
November 16, 2018
Jay@ManhattanReview posted a reply to A certain store will order 25 crates of apples. The apples in the Problem Solving forum
“Say the # of crates of McIntosh, Rome, and Winesap are x, y and z, respectively. Thus, x + y + z = 25 such that x > y and x > z. Note that there is no comparison given between y and z. Since we have to find out the least possible value of x, let''s assume that x = y = z, thus from x + ...”
November 15, 2018
Jay@ManhattanReview posted a reply to If a certain company purchased computers at $2000 each and in the Data Sufficiency forum “Say the # of computers = x and the # of printers = y Thus, the total amount for the purchase of the computers and printers = 2000x + 300y We have to get the value of x. Let''s take each statement one by one. 1. More than three printers were purchased. Certainly insufficient. 2. ...” November 15, 2018 Jay@ManhattanReview posted a reply to If x and y are unknown positive integers, is the mean of the in the Data Sufficiency forum “Let''s take each statement one by one. 1) x + y = 7. Mean = (1 + 5 + 6 + 7 + x + y)/6 = (19 + x + y)/6 = (19 + 7)/6 = 4.33 To find out median, we must first arrange terms in an ascending order. The terms, excluding x and y are: 1, 5, 6, 7. Median, excluding x and y: 5.5 If one of ...” November 15, 2018 Jay@ManhattanReview posted a reply to In single row of yellow, green and red colored tiles, every in the Data Sufficiency forum “So, there can be few arrangements. Two such as given below 1: GYR | GYR |GYR |GYR |GYR |GYR |GYR |GYR | 2: GYRGGGGGGGGGGGGGGGGGGGGG Note that G not necessarily follows any tile. Let''s take each statement one by one. 1) The 18th tile in the row is not yellow. Let''s mark the color ...” November 14, 2018 Jay@ManhattanReview posted a reply to A library bought b books for its collection. What was the in the Data Sufficiency forum “The total amount of money required to buy the b = 40 books > 12.50*40. No unique answer. Insufficient. The correct answer: E Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Begumpet | Hyderabad GMAT Prep | Bangalore GMAT Courses | ...” November 14, 2018 Jay@ManhattanReview posted a reply to Dan took a 20-question multiple-choice test in psycology. in the Data Sufficiency forum “Let''s take each statement one by one. 1) Dan answered fewer than 40 percent of the questions incorrectly. => # of incorrect qns < 40% of 20 = 8. => # of correct qns > (20 – 8 = 12). Sufficient. 2) Dan answered at least 25 percent of the questions incorrectly. => # of ...” November 14, 2018 Jay@ManhattanReview posted a reply to At a certain company, a test was given to a group of men and in the Data Sufficiency forum “Say > the average score of men = x; > the average score of women = y; > the number of men = m; > the number of women = w Thus, total score of the group = mx + wy Average score of the group = (mx + wy)/(m + w) = 80 We have to determine whether y > 85 Let''s take each ...” November 14, 2018 Jay@ManhattanReview posted a reply to What are the angles of triangle XYZ? in the Data Sufficiency forum “Pl. refer to the image below. https://i.postimg.cc/0zPZNZw6/S1-2.png https://i.postimg.cc/jww41FG1/S1-2.png The correct answer: C Hope this helps! -Jay _________________ Manhattan Review GMAT Prep Locations: Manhattan Review Begumpet | Hyderabad GMAT Prep | Bangalore GMAT Courses ...” November 14, 2018 Jay@ManhattanReview posted a reply to In a school election, Joan and Peter were the only candidate in the Data Sufficiency forum “Say the total number of votes cast by Juniors = J and the total number of votes cast by Seniors = S # of votes Joan received = 390 + (J – 336) If we get the value of J, we get the answer. Let''s take each statement one by one. (1) Joan received 40% of the votes cast by seniors ...” November 13, 2018 Jay@ManhattanReview posted a reply to In 1990 850 million movie tickets were sold in the United in the Data Sufficiency forum “# of tickets bought by ppl over 50 years = 1/5 of 850 = 170 M # of tickets bought by ppl ≤ 50 yrs = 850 – 170 = 680 Question: Did people under the age of 20 buy more than 425 million movie tickets? Let''s take each statement one by one. (1) In 1990, people under the age of 20 bought ...” November 13, 2018 Jay@ManhattanReview posted a reply to A store purchased 20 coats that each cost an equal amount in the Data Sufficiency forum “Say the selling price of each coat is %y and the cost price is$x. Thus, gross profit on 20 coats = 20(y – x). We have to get the value of (y – x). Let''s take each statement one by one. (1) If the selling price per coat had been twice as much, the store’s gross profit on the 20 ...”
November 13, 2018
Jay@ManhattanReview posted a reply to A rectangle has sides x and y and diagonal z. What is the in the Data Sufficiency forum
“Needless to state that none of the statements alone can work; there are many possibilities when we consider that x, y, and z can be real numbers (not necessarily integers). (1) and (2) together You must remember a few Pythagorean triplets: {3, 4, 5}; {5, 12, 13}; {7, 24, 25}. We see that in ...”
November 8, 2018
Jay@ManhattanReview posted a reply to Is the three-digit number n less than 550? in the Data Sufficiency forum
“Given: n is a three-digit number. Question: Is n < 550? Let''s take each statement one by one. (1) The product of the digits in n is 30. 30 = 1*2*3*5 Case 1: Say n = 615. The answer is no. Case 2: Say n = 156. The answer is yes. No unique answer. Insufficient. (2) The sum of ...”
November 8, 2018