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 ...”
45 minutes ago
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 ...”
Today
Brent@GMATPrepNow posted a reply to Three children, John, Paul, and Ringo, are playing a game. in the Problem Solving forum
“The main concept here is that all 3 children are equally likely to win this game (unless one of them possesses supernatural powers that allow him to know what numbers the other two boys will choose :-)) Also note that, if everything is random, the probability of winning by choosing the number 2 ...”
Yesterday
Brent@GMATPrepNow posted a new topic called In a barrel full of apples, 45% of the apples weigh more in the Problem Solving forum
“In a barrel full of apples, 45% of the apples weigh more than 81 grams, and 81% of the apples weigh less than 145 grams. What percent of the apples in the barrel weigh more than 81 grams but less than 145 grams? A) 16 B) 18 C) 26 D) 32 E) 36 Answer: C Difficulty level: 600 - 650 Source: ...”
Yesterday
Brent@GMATPrepNow posted a reply to What is the surface area of the solid right circular in the Problem Solving forum
“Given: radius = 3 Height = 10 Surface area of cylinder = 2πr² + 2πrh = 2π(3²) + 2π(3)(10) = 18π + 60π = 78π Answer: D Cheers, Brent”
Yesterday
Brent@GMATPrepNow posted a reply to Three children, John, Paul, and Ringo, are playing a game. in the Problem Solving forum
“This is one of my all-time favorite questions!! The main concept here is that all 3 children are equally likely to win this game (unless one of them possesses supernatural powers that allow him to know what numbers the other two boys will choose :-)) Also note that, if everything is random, ...”
Yesterday
Rich.C@EMPOWERgmat.com posted a reply to Mixture A is 15 percent alcohol, and mixture B is 50 percent in the Problem Solving forum
“Hi All, We''re told that Mixture A is 15 percent alcohol and mixture B is 50 percent alcohol and when a certain amount of each is poured together to create a 4-gallon mixture, the result contains 30 percent alcohol. We''re asked approximately how many gallons of mixture A are in the mixture. ...”
Yesterday
Rich.C@EMPOWERgmat.com posted a reply to Which of the following equations represents a line in the Problem Solving forum
“Hi All, We''re asked which of the 5 answers is the equation for a line that is perpendicular to line K in the figure above. This question is based on line/graphing rules. To start, a PERPENDICULAR line is one that has an "opposite inverse" slope (sometime called a "negative ...”
Yesterday
Rich.C@EMPOWERgmat.com posted a reply to If a certain concrete mixture contains gravel, water, and in the Problem Solving forum
“Hi All, We''re told that a certain concrete mixture contains gravel, water, and sand in a ratio of 1 to 3 to 5 by weight. We''re asked for the number of pounds of gravel that would be needed to produce 72 pounds of the mixture. This math behind this question can be approached in a number of ...”
Yesterday
Rich.C@EMPOWERgmat.com posted a reply to Need Suggestion on books in the GMAT Strategy forum
“Hi JOHNMC, Since it sounds like you''re just beginning your studies, then it would be a good idea to take a FULL-LENGTH practice CAT Test; you can take 2 for free at www.mba.com (and they come with some additional practice materials). If you want to do a little studying first, so that you can ...”
Yesterday
Brent@GMATPrepNow posted a reply to GMAT Official Guide 2019 From 2000 to 2003, the number in the Problem Solving forum
“From 2000 to 2003, the number of employees at a certain company increased by a factor of 1/4 Let x = the number of employees in 2000 So, the number of employees in 2003 = x + (1/4)x = (5/4)x From 2003 to 2006, the number of employees at this company decreased by a factor of 1/3 (5/4)x = the ...”
Yesterday
Brent@GMATPrepNow posted a reply to The usual price of a bagel was reduced during a sale. How mu in the Data Sufficiency forum
“Target question: How much money could be saved by purchasing 10 bagels at the sale price rather than at the usual price? Statement 1: The usual price for a bagel is $0.50 per bagel. Since there''s no information about the SALE price, there''s no way to calculate the amount saved. Since we ...” Yesterday 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 ...” Yesterday 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 ...”
Yesterday
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 ...”
Yesterday
Rich.C@EMPOWERgmat.com posted a reply to In a 200 member association consisting of men and women, exa in the Problem Solving forum
“Hi All, We''re told that in a 200 member association consisting of men and women, exactly 20% of men and exactly 25 % women are homeowners. We''re asked for the LEAST number of members who are homeowners. This question is built around a couple of Number Properties - and to MINIMIZE the number of ...”
January 15, 2019
Rich.C@EMPOWERgmat.com posted a reply to Roger wants to arrange three of his five books on his in the Problem Solving forum
“Hi All, We''re told that Roger wants to arrange three of his five books on his bookshelf, but two of the five books are duplicates and cannot both be selected. We''re asked for the number different ways that Roger can arrange his books. The wording of this question is a bit ''quirky'', but the ...”
January 15, 2019
Brent@GMATPrepNow posted a reply to Henry eats X scones in X percent of the time it takes Rachel in the Problem Solving forum
“Let''s use the INPUT-OUTPUT approach. Let''s assign some values of X and Y so that they satisfy the information in the question. Let X = 25. This means Henry eats 25 scones in 25 percent of the time it takes Rachel to eat Y scones Let Y = 100. This means Henry eats 25 scones in 25 percent of ...”
January 15, 2019
Brent@GMATPrepNow posted a reply to Roger wants to arrange three of his five books on his in the Problem Solving forum
“I''m not crazy about this question. The official answer suggests that, although 2 books are DUPLICATES, they''re still considered DIFFERENT. Here''s what I mean: Let''s let D and d represent the two duplicate books. Let, A, B and C represent the other three books. The official answer ...”
January 15, 2019
Brent@GMATPrepNow posted a reply to The three-digit positive integer n can be written as ABC, in in the Data Sufficiency forum
“IMPORTANT point: The VALUE of a 3-digit integer xyz is 100x + 10y + z Example: 723 = (7)(100) + (2)(10) + 3 Target question: What is the remainder when n is divided by 37? Statement 1: A + B/10 + C/100 = B + C/10 + A/100 Multiply both sides by 100 to get: 100A + 10B + C = 100B + 10C + ...”
January 15, 2019
ceilidh.erickson posted a reply to GMATPaper : As measured by the Commerce in the Sentence Correction forum
“Hm, I''m inclined to think that the sentence would NOT work as you suggested: ... corporate profits peaked in the fourth quarter of 1988 but they have slipped since then The word "peaked" already implies that it was a high point, naturally followed by lower values. The contrast word ...”
January 15, 2019
ceilidh.erickson posted a reply to At the end of the first quarter, the share price of a in the Problem Solving forum
“Calculating the correct answer isn''t difficult, as Brent demonstrated. However, savvy GMAT test takers will always try to use logic to eliminate answer choices before they even start calculating! The student who isn''t reading carefully might think "up 20%... then up 50%... that''s a ...”
January 15, 2019
ceilidh.erickson posted a reply to In a certain bathtub, both the hot and cold water fixtures in the Problem Solving forum
“We can easily use logic to get the correct answer, without doing any calculations. In WORK rate problems, when two machines / faucets / people, etc, work together, a) they work at the SUM of their respective rates, and b) the time that it takes them to complete the task together is LESS than ...”
January 15, 2019
ceilidh.erickson posted a reply to Every day in the morning Ross cycles for 2 hours. He always in the Problem Solving forum
“You could also avoid calculation and easily estimate your way to the correct answer to save time on this problem. As Mitch demonstrated, 1 mile per 12 min --> 5 miles per hr for the first part of the trip. If Ross rides at half the speed for the return trip, then the overall average speed ...”
January 15, 2019
ceilidh.erickson posted a reply to In a 200 member association consisting of men and women, exa in the Problem Solving forum
“OP, are you sure this is an OG question? Which edition of the OG did you get this problem from? It''s not in any edition I own. A google search yields only 1 post from gmatclub, and 3 posts on this forum - all posted by you in the last month. The wording of this problem does not sound like an OG ...”
January 15, 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
Brent@GMATPrepNow posted a reply to If x, y are integers, is x^2+x+y an odd integer? in the Data Sufficiency forum
“ Given: x and y are integers Target question: Is x² + x + y an odd integer? This is a good candidate for rephrasing the target question. Take x² + x + y and factor the first two terms to get: x(x + 1) + y Notice that x and x+1 are CONSECUTIVE INTEGERS, which means one value is ODD and ...”
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
Brent@GMATPrepNow posted a reply to In a 200 member association consisting of men and women, exa in the Problem Solving forum
“In order to minimize the number of homeowners, we must MAXIMIZE the number of men in the group, since the proportion of male homeowners (20%) is less than the proportion of female homeowners (25%) So, let''s see what happens if there are 199 men and 1 woman. If 20% (aka 1/5) of the men are ...”
January 15, 2019
Rich.C@EMPOWERgmat.com posted a reply to Probability question in the Problem Solving forum
“Hi yenngoc2409, I''m going to give you a hint so that you can adjust your calculation. Your result is too high because you have not accounted for the ''duplicate'' entries. For example, if the 4 cards were 2233, then you have an option that has two pair... but you also have two of the options ...”
January 14, 2019
Brent@GMATPrepNow posted a reply to Three machines have equal constant work rates. It takes h + in the Problem Solving forum
“ It takes h + 3 hours to produce 360 toys when 2 machines work together So, during those h + 3 hours, EACH machine makes 180 toys So, ONE machine can produce 180 toys in h + 3 hours rate = output/time So, we can write: rate of ONE machine = 180/(h + 3) It takes h hours to produce 360 toys ...”
January 14, 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
Rich.C@EMPOWERgmat.com posted a reply to CARS in the Problem Solving forum
“Hi All, We''re told that the number of defects in the first five cars to come through a new production line are 9, 7, 10, 4, and 6, respectively and that the sixth car through the production line has either 3, 7, or 12 defects. We''re asked which of the following three values does the MEAN ...”
January 13, 2019
Rich.C@EMPOWERgmat.com posted a reply to GMAT Help Required.. 4 months to go.. diag 540 (38/27) in the GMAT Strategy forum
“Hi amg0410, To start, a 540 is a solid initial CAT Score (the average Score on the Official GMAT hovers around 550 most years). Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on your timeline and your goals: ...”
January 13, 2019
Rich.C@EMPOWERgmat.com posted a reply to Carlos runs a lap around the track in x seconds. His second in the Problem Solving forum
“Hi All, We''re told that Carlos runs a lap around the track in X SECONDS. His second lap is five SECONDS SLOWER than the first lap, but the third lap is two SECONDS FASTER than the first lap. We''re asked for Carlos’s average (arithmetic mean) number of MINUTES per LAP, in terms of X. This ...”
January 12, 2019
Rich.C@EMPOWERgmat.com posted a reply to Patricia builds two triangles, each with 30 feet of wood. in the Problem Solving forum
“Hi All, We''re told that Patricia builds two triangles, EACH with 30 feet of wood. The first triangle ABC is built to maximize the LENGTH of the BASE side. The second triangle DEF is built to maximize the AREA of the triangle. In addition, the lengths of all line segments are INTEGERS. We''re ...”
January 12, 2019
Rich.C@EMPOWERgmat.com posted a reply to I took the GMAT today in the GMAT Strategy forum
“Hi mbaorbust3, I''m sorry to hear that Test Day did not go as well as hoped. Business Schools generally don''t care if you retake the GMAT though, so you have little to worry about in that regard. Before we can discuss how you might improve this next phase of your studies, it would help if you ...”
January 12, 2019
ceilidh.erickson posted a reply to Admissions cosultants in the The Application Process forum
“It looks like BTG has added that feature since you posted: https://reviews.beatthegmat.com/ You should also check out Poets & Quants: https://poetsandquants.com/2018/04/27/best-mba-admission-consultants/ https://poetsandquants.com/consultants/”
January 12, 2019
ceilidh.erickson posted a reply to 60Day GMAT PREP Question in the GMAT Strategy forum
“Studying without reviewing is almost entirely useless - it''s like trying to collect water with a sieve. Or trying to collect tennis balls like this: https://www.youtube.com/watch?v=L5C8rnpAbIs It is absolutely essential that you make reviewing a large part of your process. In fact, you should ...”
January 12, 2019
ceilidh.erickson posted a reply to Post-First Exam: What are my next steps? in the GMAT Strategy forum
“You mention that you''ve read most of the guides and done practice problems. There are a few things you haven''t mentioned, though: - how were you doing those practice problems? Were you doing them timed, and carefully tracking your errors? - do you have a solid understanding of test strategy as ...”
January 12, 2019
ceilidh.erickson posted a reply to Over the last five years, demand for hotel rooms in Cenopoli in the Critical Reasoning forum
“If we want to EVALUATE an argument, we need to establish the conclusion of the argument and its supporting premises. We then need to determine what information is MISSING. Premises: - demand for hotel rooms in Cenopolis has increased significantly - so has the average price Cenopolis hotels ...”
January 12, 2019
ceilidh.erickson posted a reply to Bluegrass musician Bill Monroe, whose repertory, views on in the Sentence Correction forum
“The reason "that of" redundant is that in the non-underlined portion we have "his own," which is already possessive. (This is similar to saying "my music of mine.") Since we can''t change that non-underlined part, none of the fixes you suggested would work for this ...”
January 12, 2019
ceilidh.erickson posted a reply to People with high blood pressure are generally more nervous a in the Critical Reasoning forum
“For more on how the GMAT tests correlation v. causation, see: https://www.beatthegmat.com/male-bowerbirds-construct-elaborately-decorated-nests-or-t303937.html#818930 https://www.beatthegmat.com/veritas-cat-question-doubt-t300364.html#808487 ...”
January 12, 2019
ceilidh.erickson posted a reply to People with high blood pressure are generally more nervous a in the Critical Reasoning forum
“This argument demonstrates a very common logical flaw: CORRELATION v. CAUSATION. We''re given that "people with high blood pressure are generally more nervous and anxious than people who do not have high blood pressure." In other words, these two phenomena tend to occur together. ...”
January 12, 2019
ceilidh.erickson posted a reply to Researchers have found entombed in Burmese amber a 102-milli in the Sentence Correction forum
“This question is primarily testing MODIFIERS and LOGICAL PARALLELISM. Researchers have found entombed in Burmese amber a 102-million-year-old tick grasping the feather of a Velociraptor, providing the first direct evidence that the tiny pests drank dinosaur blood. (A) entombed in Burmese ...”
January 12, 2019
ceilidh.erickson posted a reply to A new commercial radio station in Greenfield plans to play s in the Critical Reasoning forum
“The chain of logic in this argument is as follows: play songs that were popular hits fifteen to twenty-five years ago --> attract an audience made up mainly of people between thirty-five and forty-five years old --> strong market appeal to advertisers. This argument is relying on the ...”
January 12, 2019
ceilidh.erickson posted a reply to I took the GMAT today in the GMAT Strategy forum
“I''m so sorry to hear that. But you''re not alone - this test is hard, and many people don''t get the score they''re hoping for on the first try. Here are some possible explanations for why your score went down: 1. You were emphasizing content over strategy (esp timing strategy) You said ...”
January 12, 2019
Brent@GMATPrepNow posted a reply to There is a total of 120 marbles in a box, each of which is in the Problem Solving forum
“...the probability that it So, 1/4 of the 120 marbles are white. In other words, there are 30 white marbles. ...the probability that it So, 1/3 of the 120 marbles are green . In other words, there are 40 green marbles. Altogether, there are 70 marbles that are EITHER white or green. ...”
January 12, 2019
Brent@GMATPrepNow posted a reply to To furnish a room in model home, an interior decorator is to in the Problem Solving forum
“Total # of combinations = (# of ways to select 2 chairs)(# of ways to select 2 tables) So, 150 = (# of ways to select 2 chairs)(# of ways to select 2 tables) # of ways to select 2 chairs 5 tables, choose 2 of them. Since the order of the selected chairs does not matter, we can use ...”
January 11, 2019
Rich.C@EMPOWERgmat.com posted a reply to In a certain bathtub, both the hot and cold water fixtures in the Problem Solving forum
“Hi All, We''re told that In a certain bathtub, both the hot and cold water fixtures leak. The cold water leak alone would fill an empty bucket in C hours, and the hot water leak alone will fill the same bucket in H hours, where C < H. If both fixtures began to leak at the same time into the ...”
January 11, 2019
Rich.C@EMPOWERgmat.com posted a reply to The following tables show the revenues and costs, in in the Problem Solving forum
“Hi All, We''re told that Profit = Revenue - Costs and that costs will remain constant from 2007 to 2008, while revenues INCREASE by 10% in that same period. We''re asked for the percent increase in PROFITS from 2007 to 2008. This question comes down to some Arithmetic and the Percentage Change ...”
January 11, 2019
Rich.C@EMPOWERgmat.com posted a reply to A class consists of 12 girls and 20 boys. One quarter of the in the Problem Solving forum
“Hi All, We''re told that a class consists of 12 girls and 20 boys. One-quarter of the girls in the class have blue eyes. We''re asked for the probability that a randomly selected child is a girl who does NOT have blue eyes. This question comes down to some basic organization and Arithmetic. ...”
January 11, 2019
Rich.C@EMPOWERgmat.com posted a reply to Guidance on study plan in the GMAT Strategy forum
“Hi szhao, To start, a 730 initial Score is an outstanding performance (the average Score on the Official GMAT hovers around 550 most years), so you''re clearly a strong critical thinker. Focusing on the GMAT now - years before you will actually need your Score - is also a smart choice. Since ...”
January 11, 2019
Brent@GMATPrepNow posted a reply to At a certain fruit stand, the price of each apple is 40 in the Problem Solving forum
“It turns out that the cost per apple is irrelevant. Here''s why: The average (arithmetic mean) price of the 10 pieces of fruit is 56 cents So, (total value of all 10 pieces of fruit)/10 = 56 cents This means, total value of all 10 pieces of fruit = 560 cents How many oranges must Mary put ...”
January 11, 2019
Brent@GMATPrepNow posted a reply to A librarian has a set of ten books, including four different in the Problem Solving forum
“Take the task of arranging the 10 books and break it into stages. Stage 1: Arrange the 4 books about Abe Lincoln in a row We can arrange n objects in n! ways. So, we can arrange the 4 books in 4! ways IMPORTANT: Now we''ll "glue" the 4 Abe Lincoln books together to form 1 SUPER ...”
January 11, 2019
Brent@GMATPrepNow posted a reply to By what percent is 25 greater than 15? in the Problem Solving forum
“An alternative approach is to test the answer choices First, however, we can eliminate some answer choices by first testing an easy value: 50% Is 25 50% greater than 15? Well, 50% of 15 = 7.5 So, 50% greater than 15 = 15 + 7.5 = 22.5 22.5 is too small (we need to get 25), so we need a ...”
January 11, 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
Rich.C@EMPOWERgmat.com posted a reply to The price of a phone call consists of a standard connection in the Problem Solving forum
“Hi All, We''re told that the price of a phone call consists of a standard connection fee, which is constant, plus a per minute charge, a 10-minute call costs $2.90 and a 16-minute call costs$4.40. We''re asked for the cost of a 13-minute call. This question can be solved in a couple of ...”
January 10, 2019
Rich.C@EMPOWERgmat.com posted a reply to This year, x people won an Olympic medal for water in the Problem Solving forum
“Hi All, This question can be solved by TESTing VALUES (and taking a few notes). We''re told that X people won a medal for water competitions. Of those X people, 1/3 won a medal for swimming; of those who won a medal for SWIMMING, 1/4 also won a medal for diving. The common denominator ...”
January 10, 2019
Brent@GMATPrepNow posted a reply to The price of a phone call consists of a standard connection in the Problem Solving forum
“Let C = price of connection fee Let M = the price PER MINUTE A 10-minute call costs $2.90 We can write: C + 10M = 2.90 A 16-minute call costs$4.40. We can write: C + 16M = 4.40 How much does a 13-minute call cost? So far, we have: C + 10M = 2.90 C + 16M = 4.40 ONE (slower) ...”
January 10, 2019
Brent@GMATPrepNow posted a reply to At the end of the first quarter, the share price of a in the Problem Solving forum
“Let $100 = share price at the beginning of the year At the end of the first quarter, the share price of a certain mutual fund was 20 percent higher than it was at the beginning of the year. So,$120 = share price at the end of the first quarter At the end of the second quarter, the share ...”
January 10, 2019
Brent@GMATPrepNow posted a reply to Bite-sized video lessons from GMAT Prep Now in the GMAT Math forum
“Data Sufficiency Video #1: Introduction to GMAT Data Sufficiency Video: https://www.youtube.com/watch?v=3MaEqnSnK-s Cheers, Brent”
January 10, 2019
Brent@GMATPrepNow posted a reply to 17^27 has a units digit of: in the Problem Solving forum
“Look for a pattern 17^1 = 17 17^2 = (17)(17) = ---9 17^3 = (17)(17^2) = (17)(---9) = ----3 17^4 = (17)(17^3) = (17)(---3) = ----1 17^5 = (17)(17^4) = (17)(---1) = ----7 NOTICE that we''re back to where we started. 17^5 has units digit 7, and 17^1 has units digit 7 So, at this point, ...”
January 10, 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
Rich.C@EMPOWERgmat.com posted a reply to How many integers between in the Problem Solving forum
“Hi All, This question is essentially about arithmetic and taking the proper notes. You can go about the math steps in a couple of different ways though - depending on how you ''see'' this information. From the prompt, we know that the farmer spent $35 on feed.... 40% of his money on chicken ...” January 10, 2019 Rich.C@EMPOWERgmat.com posted a reply to Stock - Number of shares V ------------------- 68 W ------- in the Problem Solving forum “Hi All, "Range" questions come from the broader category of statistics, which will show up a couple of times on the GMAT. The range of a group of numbers is the difference between the largest number and the smallest number. Based on the original number of shares, the range would ...” January 10, 2019 Rich.C@EMPOWERgmat.com posted a reply to The water from one outlet, flowing at a constant rate, can f in the Problem Solving forum “Hi All, This question is a standard "Work Formula" question. When you have 2 entities sharing a task, you can use the following formula to figure out how long it takes for the 2 entities to complete the task together. Work = (A)(B)/(A+B) where A and B are the individual times ...” January 10, 2019 Rich.C@EMPOWERgmat.com posted a reply to The architects of a certain type of building estimate in the Problem Solving forum “Hi All, We''re told that the architects of a certain type of building estimate construction costs to be$2.0 million per floor for each of the first 5 floors, $2.5 million per floor for each of the next 3 floors, and$3.5 million per floor for any additional floors. We''re asked what the ...”
January 10, 2019
Brent@GMATPrepNow posted a reply to The water from one outlet, flowing at a constant rate, can f in the Problem Solving forum
“One approach is to assign a NICE NUMBER to the volume of the swimming pool. This number will work well with the two pieces of information (fill pool in 9 hours and fill pool in 5 hours). So, let''s say that the volume of the pool is 45 gallons. The water from one outlet, flowing at a constant ...”
January 9, 2019
Brent@GMATPrepNow posted a reply to If x and y are positive, is x > y? in the Data Sufficiency forum
“Target question: Is x > y? This is a good candidate for rephrasing the target question. Since y is POSITIVE, we can safely take the inequality x > y and divide both sides by y to get: x/y > 1 REPHRASED target question: Is x/y > 1? Aside: Here’s a video with tips on rephrasing ...”
January 9, 2019
Brent@GMATPrepNow posted a reply to Emily keeps 12 different pairs of shoes (24 individual shoes in the Problem Solving forum
“P(dog selects matching pair) = P(dog chooses ANY sock 1st AND 2nd sock matches the 1st sock) = P(dog chooses ANY sock 1st) x P(2nd sock matches the 1st sock) = 24/24 x 1/23 = 1/23 Answer: C Cheers, Brent”
January 9, 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
Brent@GMATPrepNow posted a reply to On a certain Monday, Carlos drove to work at an average in the Problem Solving forum
“Average speed = (TOTAL distance)/TOTAL travel time)Carlos drove to work at an average speed of 50 miles per hour Time = distance/speed So, travel time TO work = d/50 hours Carlos drove home from work at an average speed of 70 miles per hour So, travel time FROM work = d/70 hours So, TOTAL ...”
January 8, 2019
Brent@GMATPrepNow posted a reply to How many integers between in the Problem Solving forum
“He spent 40% (of the $35) on chicken feed. 40% of$35 = $14. So, he spent$14 on chicken feed. He got a 20% discount on the chicken feed. In other words, he paid 80% of the original price. So, let C = original price of chicken feed. We can write 80% of C = $14 Or we can write 0.8C =$14 ...”
January 8, 2019
Brent@GMATPrepNow posted a reply to On Monday, the opening price of a certain stock was $100 in the Problem Solving forum “On Monday, the opening price of a certain stock was$100 per share and its closing price was $110 per share. On Tuesday the closing price of the stock was 10 percent less than its closing price on Monday, We can say that the stock LOST 10% of its value. OR we can say that the stock RETAINED 90% ...” January 8, 2019 Rich.C@EMPOWERgmat.com posted a reply to Sumanta needs to type up her 1950-word paper by its 5 pm in the Problem Solving forum “Hi All, This question can be solved by TESTing THE ANSWERS. This is essentially a rate question, but the rate (and the time spent at that rate) changes depending on what time Rachel begins typing. Based on the information in the prompt, we know that if Rachel begins typing at 3pm, then she ...” January 8, 2019 Rich.C@EMPOWERgmat.com posted a reply to In the first round of the elections, the only two candidates in the Problem Solving forum “Hi All, We''re told that in the first round of the elections, the only two candidates got exactly the SAME number of votes and during the second round, 15,000 votes switched from the first candidate to the second one. We''re also told that the total number of votes remained the same in both ...” January 8, 2019 Brent@GMATPrepNow posted a reply to A department manager distributed a number of pens, pencils, in the Data Sufficiency forum “Jay''s solution is great. I just wanted to mention that this question hinges largely on the fact that the number of pens, pencils, and pads that each staff member receives MUST HAVE INTEGER VALUES. So, for example, if statement 1 were different and statement 2 read "The manager ...” January 8, 2019 Brent@GMATPrepNow posted a reply to In 1982 and 1983, Company B's operating expenses were$12.0 in the Problem Solving forum
“The profit in 1982 = 15.6 - 12.0 = $3.6 million The profit in 1983 = 18.8 - 14.0 =$4.8 million Percent change = (100)(new - old)/old = (100)(4.8 - 3.6)/3.6 = (100)(1.2)/(3.6) = (100)(1/3) = 33 1/3% Answer: D Cheers, Brent”
January 8, 2019
Brent@GMATPrepNow posted a reply to x is a positive integer, and the units digits of both (x+2)^ in the Problem Solving forum
“Another approach is to test the answer choices A. If the units digit of x is 1, is it the case that units digits of both (x+2)² and (x-2)² is 9? Well, (x+2)² = (1+2)² = 9. Works! To test (x-2)², let''s let x = 11. We get: (11-2)² = 9² = 81. NO GOOD ELIMINATE A B. If the units digit ...”
January 8, 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
Rich.C@EMPOWERgmat.com posted a reply to What is the value of 25*8÷50÷2 in the Problem Solving forum
“Hi All, We''re asked for the value of 25*8÷50÷2. This question involves rules called "Order of Operations", but as long as you know those rules, the work here isn''t too difficult. In Order of Operations, both multiplication and division are on the same ''level'' (meaning that you ...”
January 8, 2019
Rich.C@EMPOWERgmat.com posted a reply to HELP!!! Very POOR VERBAL score. in the Suggestions and Feedback forum
“Hi Linda, Training to score at a high level on the GMAT often requires more than just ''weekend study'', so if you can put in a little study time during the week (even if it''s just an hour a day), then that would likely help you a great deal. As it stands, with a 580, you''re actually closer to ...”
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
Rich.C@EMPOWERgmat.com posted a reply to The main ingredient in a certain prescription drug capsule c in the Problem Solving forum
“Hi All, We''re told that the main ingredient in a certain prescription drug capsule cost $500 per kilogram. If each capsule contains 600 milligrams of ingredient, what is the cost of the ingredient in a capsule? (1 kilogram = 10^6 milligrams). This is a ''unit conversion'' question and comes ...” January 7, 2019 Brent@GMATPrepNow posted a reply to In 1991, the price of a house was 80% of its original price. in the Problem Solving forum “I''d typically assign a "nice" value to the original price, and then follow the steps that Mitch demonstrated. Alternatively, we can solve the question algebraically In 1991, the price of a house was 80% of its original price. Let x = the original price So, 0.8x = the 1991 price ...” January 7, 2019 Brent@GMATPrepNow posted a reply to If triangle ABC is an isosceles triangle, what is ∠ABC? in the Data Sufficiency forum “Target question: What is ∠ABC? Given: Triangle ABC is an isosceles triangle So, ∆ABC has 2 equal angles Statement 1: ∠CAB = 45 degrees Since ∆ABC has 2 equal angles, there are two possible triangles that satisfy statement 1: Case a: ∠CAB = 45, ∠BCA = 45 and ∠ABC = 90. ...” January 7, 2019 Brent@GMATPrepNow posted a reply to If f(a*b) = f(a) + f(b), what is the value of f(1)? in the Problem Solving forum “To generalize Mitch''s and Fabio''s solutions, notice that, as long as we can get f(1) involved in the process, we''ll arrive at answer choice C every time. Notice that k = 1*k Since f(a*b) = f(a) + f(b), we can write: f(1*k) = f(1) + f(k) Simplify: f(k) = f(1) + f(k) Subtract f(k) from both ...” January 7, 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 Rich.C@EMPOWERgmat.com posted a reply to After her birthday, Fiona had D dollars in gift money. in the Problem Solving forum “Hi VJesus12, We''re told that after her birthday, Fiona had D dollars in gift money. She spent 3/5 of this on an electric skateboard, then she spent 1/3 of what WAS LEFT on a movie passcard, and then finally put the last$80 in the bank. Assuming she made no other purchases with that money, ...”
January 6, 2019
Rich.C@EMPOWERgmat.com posted a reply to In the coordinate geometry plane, point A is the midpoint in the Problem Solving forum
“Hi VJesus12, This question can be solved with a bit of general graphing (you do not need to be hyper-accurate with your drawing to get the correct answer). To start, we''re told that in the coordinate geometry plane, Point A is the midpoint between points (5,8) and (-3, -2). Draw those two ...”
January 6, 2019
Rich.C@EMPOWERgmat.com posted a reply to In the figure above, an equilateral triangle is inscribed in the Problem Solving forum
“Hi VJesus12, We''re told that in the figure above, an EQUILATERAL triangle is inscribed in a circle and the arc bounded by adjacent corners of the triangle is between 4π and 6π long. We''re asked which of the following COULD be the diameter of the circle. As scary as this question might look, ...”
January 6, 2019
Brent@GMATPrepNow posted a reply to After her birthday, Fiona had D dollars in gift money. in the Problem Solving forum
“Another approach is to use algebra. After her birthday, Fiona had D dollars in gift money. She spent 3/5 of this on an electric skateboard. If Fiona SPENT 3/5 of D dollars, then 2/5 of D dollars REMAINED In other words, the amount remaining at the end of the day = 2D/5 dollars The next day, ...”
January 6, 2019
Brent@GMATPrepNow posted a reply to After her birthday, Fiona had D dollars in gift money. in the Problem Solving forum
“One option is to WORK BACKWARDS The next day, she spent 1/3 of what was left on a movie passcard, and then finally put the last $80 in the bank. If she spent 1/3 of her money on a movie passcard, then 2/3 of her money remained (which she put in the bank). This means 2/3 of her money =$80 We ...”
January 6, 2019
Brent@GMATPrepNow posted a reply to A retailer sells only radios and clocks. If she currently ha in the Data Sufficiency forum
“ Given: A retailer sells only radios and clocks, and she currently has 44 total items in inventory. Target question: How many radios are there in the inventory Statement 1: The retailer has more than 28 radios in inventory There are several scenarios that satisfy statement 1. Here are ...”
January 6, 2019
Brent@GMATPrepNow posted a reply to Number Properties in the Data Sufficiency forum
“The error is highlighted above in blue. if a>0 we will have the answer as YES is ALMOST true. The only time it''s not true is when a = 1 If a = 1, then the answer is NO. We can verify this using either the original inequality or the rephrased inequality. Take "Is a + 1/a > ...”
January 6, 2019
Brent@GMATPrepNow posted a reply to A store sells erasers for 0.23$per piece and pencil for in the Data Sufficiency forum “This question illustrates a common trap on the GMAT. As Jay has shown, with statement 2, we''re able to write the equation 23x + 11y = 170 , and in high school we learned that, if we''re given 1 equation with 2 variables, we cannot find the value of either variable. However, if we restrict the ...” January 5, 2019 Brent@GMATPrepNow posted a reply to A barn is enclosed in the shape of a 6-sided figure; all in the Data Sufficiency forum “This Date Sufficiency question is almost identical to the following Problem Solving question, which requires us to find the actual area: http://www.beatthegmat.com/plz-explain-t270003.html Cheers, Brent” January 5, 2019 Brent@GMATPrepNow posted a reply to In the rectangular coordinate system above, the area of in the Problem Solving forum “Let''s draw a rectangle around the triangle (as shown below) and then subtract from the rectangle''s area (28) the areas of the 3 right triangles that surround the triangle in question. We get the following: http://s13.postimage.org/a47qx0j8j/triangle_in_coordinate_plane_2.jpg So, the area ...” January 5, 2019 Brent@GMATPrepNow posted a reply to What is the perimeter of quadrilateral Q? in the Data Sufficiency forum “Target question: What is the perimeter of quadrilateral Q? If we recognize that each statement alone is not sufficient, we can jump straight to...... Statements 1 and 2 combined There are several quadrilaterals satisfy BOTH statements. Here are two: Case a: Q is a rectangle with width 1 ...” January 5, 2019 Brent@GMATPrepNow posted a reply to The price of a consumer good increased by p% in the Problem Solving forum “Let$100 be the original price The price of a consumer good increased by p% during 2012 p% = p/100, so a p% INCREASE is the same a multiplying the original price by 1 + p/100 So, the new price = ($100)(1 + p/100) The price then decreased by 12% during 2013 A 12% DECREASE is the same a ...” January 5, 2019 Brent@GMATPrepNow posted a reply to The number of students who attend a school could be divided in the Problem Solving forum “The number of students who attend a school could be divided among 10, 12, or 16 buses, such that each bus transports an equal number of students. This tells us that the TOTAL number of students is a multiple of 10, 12 and 16 What is the minimum number of students that could attend the school? ...” January 5, 2019 Brent@GMATPrepNow posted a reply to Set K consists of a finite number of consecutive odd in the Data Sufficiency forum “Target question: What is the value of y - x? Given: Set K consists of a finite number of consecutive odd integers Statement 1: The average (arithmetic mean) of set K is –36 There''s a nice rule that says, "In a set where the numbers are equally spaced, the mean will equal the ...” January 5, 2019 Brent@GMATPrepNow posted a reply to The value of (10^8-10^2)/(10^7-10^3) is closest to which in the Problem Solving forum “Since the answer choices are so spread out, we can be quite aggressive with out estimation. First, 10⁸ - 10² can be rounded to 10⁸ Is this reasonable? Well, 10⁸ equals 100,000,000, so subtracting 10² (aka 100) from 100,000,000 still leaves us with approximately 100,000,000 ...” January 5, 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
Brent@GMATPrepNow posted a reply to Each of the 25 balls in a certain box is either red, blue, in the Data Sufficiency forum
“Target question: What is the value of P(white or even)? To solve this, we need P(A or B) = P(A) + P(B) - P(A & B) So, P(white or even) = P(white) + P(even) - P(white & even) Statement 1: P(white & even) = 0 We can add this to our probability equation to get: P(white or even) = ...”
January 4, 2019
Brent@GMATPrepNow posted a reply to The profit from the sale of a certain appliance increases, in the Data Sufficiency forum
“Target question: Did the profit exceed $4 million on sales of 380,000 units? Given: The profit from the sale of a certain appliance increases, though not proportionally, with the number of units sold. IMPORTANT: This means that we CANNOT make any "good" assumptions about the ...” January 4, 2019 Rich.C@EMPOWERgmat.com posted a reply to Alice, Benjamin, and Carol each try independently to win a c in the Problem Solving forum “Hi jain2016, Since we have the probabilities of each person winning a game, we can ''map out'' the 3 situations in which 2 of them win and 1 of them loses: A wins, B wins, C loses = (1/5)(3/8)(5/7) = 15/240 A wins, B loses, C wins = (1/5)(5/8)(2/7) = 10/240 A loses, B wins, C wins = ...” January 4, 2019 Rich.C@EMPOWERgmat.com posted a reply to If y = 2 + 2K and y≠0y≠0, then 1/y + 1/y + 1/y + 1/y = ? in the Problem Solving forum “Hi All, We''re told that Y = 2 + 2K and Y ≠ 0. We''re asked for the value of 1/Y + 1/Y + 1/Y + 1/Y. This question can be solved in a number of different ways, including by TESTing VALUES. Since we''re adding four fractions with the SAME denominator, we can just use some basic Arithmetic and ...” January 4, 2019 Brent@GMATPrepNow posted a reply to If y = 2 + 2K and y≠0y≠0, then 1/y + 1/y + 1/y + 1/y = ? in the Problem Solving forum “Given: y = 2 + 2k Rewrite as: y/1 = (2 + 2k)/1 Flip both fractions to get: 1/y = 1/(2 + 2k) So, 1/y + 1/y + 1/y + 1/y = 1/(2 + 2k) + 1/(2 + 2k) + 1/(2 + 2k) + 1/(2 + 2k) = 4/(2 + 2k) = 4/(2)(1 + k) = 2/(1 + k) Answer: B Cheers, Brent” January 4, 2019 Brent@GMATPrepNow posted a reply to Is x/y < 0? in the Data Sufficiency forum “Target question: Is x/y < 0? Statement 1: (x^4)(y^5) < 0 There are several values of x and y that satisfy statement 1. Here are two: Case a: x = 1 and y = -1. Notice that (x^4)(y^5) = (1^4)(-1^5) = (1)(-1) = -1, which is less than 0. In this case, x/y = 1/(-1) = -1. So, the answer to ...” January 4, 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
Brent@GMATPrepNow posted a reply to If 4+ 1n = 55n, what is the value of n? in the Problem Solving forum
“GIVEN: √(4 + 1/n) = 5√(5/n) Square both sides to get: (5)(5)√(5/n)√(5/n) Simplify right side again: 4 + 1/n = 25(5/n) Simplify right side: 4 + 1/n = 125/n Multiply both sides by n to get: 4n + 1 = 125 Subtract 1 from both sides to get: 4n = 124 Solve: n = 124/4 =31 Answer: A ...”
January 3, 2019
Brent@GMATPrepNow posted a reply to On a construction site, 16 of the men wear helmets, and 19 in the Data Sufficiency forum
“I thought I''d point out that Jay''s approach is also known as the Double Matrix Method. This technique can be used for most questions featuring a population in which each member has two characteristics associated with it. Here, we have a population of construction worker, and the two ...”
January 3, 2019
Brent@GMATPrepNow posted a reply to If the average of four numbers is 35, how many of the in the Data Sufficiency forum
“Target question: How many of the numbers are less than 35? Given: The average of four numbers is 35 All this tells us is that the SUM of the 4 numbers is 140 (since 140/4 = 35) Given the limited amount of information, it''s likely that the correct answer is C or E Statement 1: None of ...”
January 3, 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
Brent@GMATPrepNow posted a reply to Absolute value in the Problem Solving forum
“A quick approach is to simply test the answer choices A) -2 No good. The absolute value of something cannot be negative B) 0 Plug in to get |0² - 6| = 0. Doesn''t work. C) 1 Plug in to get |1² - 6| = 1. Doesn''t work. D) 3 Plug in to get |3² - 6| = 3. WORKS!!! Answer: D Cheers, ...”
January 3, 2019
Brent@GMATPrepNow posted a reply to If m and n are positive integers such that m>n, what is t in the Data Sufficiency forum
“ Given: m and n are positive integers such that m > n Target question: What is the remainder when m² – n² is divided by 21? Statement 1: The remainder when (m + n) is divided by 21 is 1 There are several values of m and n that satisfy statement 1. Here are two: Case a: m = 12 and ...”
January 2, 2019
Brent@GMATPrepNow posted a reply to If x + y is not equal to 0. What is the value of (ax + ay)/( in the Data Sufficiency forum
“Target question: What is the value of (ax + ay)/(x + y)? This is a good candidate for rephrasing the target question. Take the expression: (ax + ay)/(x + y) Factor the numerator to get: a(x + y)/(x + y) Simplify the fraction to get: a Since (ax + ay)/(x + y) = a, we can rephrase the target ...”
January 2, 2019
Brent@GMATPrepNow posted a reply to Can n be expressed as the difference of 2 prime numbers? in the Data Sufficiency forum
“Target question: Can n be expressed as the difference of 2 prime numbers? Statement 1: (n-17)(n-21) = 0 This tells us that EITHER n = 17 OR n = 21 IMPORTANT: Upon seeing that n can equal one of two values, some students will incorrectly conclude that statement 1 is not sufficient. However, ...”
January 2, 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
Brent@GMATPrepNow posted a reply to In a 200 member association consisting of men and women, exa in the Problem Solving forum
“In order to minimize the number of homeowners, we must MAXIMIZE the number of men in the group, since the proportion of male homeowners (20%) is less than the proportion of female homeowners (25%) So, let''s see what happens if there are 199 men and 1 woman. If 20% (aka 1/5) of the men are ...”
January 1, 2019
Rich.C@EMPOWERgmat.com posted a reply to In a stack of boards at a lumber yard, the 20th board counti in the Problem Solving forum
“Hi All, Since the answers to the question are all numbers, we can use the answers ''against'' the prompt and TEST THE ANSWERS. Here''s how… Let''s start with Answer B. Answer B: 36 boards IF the number of boards was 36, then the 20th board from the top would be the 17th board from ...”
January 1, 2019
Rich.C@EMPOWERgmat.com posted a reply to In a 200 member association consisting of men and women, exa in the Problem Solving forum
“Hi All, We''re told that in a 200 member association consisting of men and women, exactly 20% of men and exactly 25 % women are homeowners. We''re asked for the LEAST number of members who are homeowners. This question is built around a couple of Number Properties - and to MINIMIZE the number of ...”
January 1, 2019
Rich.C@EMPOWERgmat.com posted a reply to A department store receives a shipment of 1,000 shirts, for in the Problem Solving forum
“Hi All, We''re told that a department store receives a shipment of 1,000 shirts, for which it pays $9,000. The store sells the shirts at a price 80 percent above cost for one month, after which it reduces the price of the shirts to 20 percent above cost. The store sells 75 percent of the shirts ...” January 1, 2019 Brent@GMATPrepNow posted a reply to What is the value of the integer n? in the Data Sufficiency forum “Target question: What is the value of the integer n? Statement 1: n is a prime factor of 21 21 = (3)(7) So, EITHER n = 3 OR n = 7 Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT Statement 2: n is a factor of 49 49 has three positive factors: 1, ...” January 1, 2019 Brent@GMATPrepNow posted a reply to If 2x+y=3 and 4x^2-4xy+y^2=1, what is the value of xy? in the Problem Solving forum “This question becomes a lot easier if we recognize that (2x + y)² = 4x² + 4xy + y² (which is VERY similar to 4x² - 4xy + y²) Here''s what I mean: Take 2x + y = 3 and square both sides to get: (2x + y)² = 3² Simplify both sides to get: 4x² + 4xy + y²= 9 We now have two (quite ...” January 1, 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 Brent@GMATPrepNow posted a reply to Given four rods of length 1 meter, 3 meters, 5 meters, and 7 in the Problem Solving forum “IMPORTANT RULE: If two sides of a triangle have lengths A and B, then . . . DIFFERENCE between A and B < length of third side < SUM of A and B Let''s focus on this part: length of third side < SUM of A and B We can also say that the length of LONGEST side must be less than the SUM of ...” December 31, 2018 Brent@GMATPrepNow posted a reply to Brady, Charlie, and Daryl play on the same baseball team. Th in the Data Sufficiency forum “ Given: Brady, Charlie, and Daryl play on the same baseball team. Target question: The number of home runs hit by Brady in a particular season is what fraction of the total home runs hit by the three players in that season? This is a good candidate for rephrasing the target question. Let ...” December 31, 2018 Brent@GMATPrepNow posted a reply to What is the 1st term in sequence S ? (1) The 3rd term in S in the Data Sufficiency forum “Target question: What is the 1st term in sequence S ? Statement 1: The 3rd term in S is 2 Since we''re not given any information about the NATURE of the sequence, there''s no way to answer the target question with certainty. So, statement 1 is NOT SUFFICIENT Statement 2: The 2nd term in ...” December 31, 2018 Brent@GMATPrepNow posted a reply to Bite-sized video lessons from GMAT Prep Now in the GMAT Math forum “Here''s our video on Weighted Averages video: https://www.youtube.com/watch?v=B7J6lr_qBG4 Cheers, Brent” December 31, 2018 Brent@GMATPrepNow posted a reply to Marcia's bucket can hold a maximum of how many liters of wat in the Data Sufficiency forum “Target question: Marcia''s bucket can hold a maximum of how many liters of water? In other words, what is the TOTAL CAPACITY of Marcia''s bucket? Statement 1: The bucket currently contains 9 liters of water. Not enough info to determine the TOTAL CAPACITY of Marcia''s bucket. Since we ...” December 30, 2018 Brent@GMATPrepNow posted a reply to In a stack of boards at a lumber yard, the 20th board counti in the Problem Solving forum “Let''s start from the bottom and work our way up: We''ll start with the 16th board counting from the bottom of the stack Right BELOW that 16th board, we have a board that we''ll call Larry. So, Larry is the 15th board counting from the bottom of the stack. So, starting from the bottom and ...” December 30, 2018 Brent@GMATPrepNow posted a reply to Overlapping Sets in the Data Sufficiency forum “I thought I''d point out that Manasa3190''s approach is known as the Double Matrix Method. This technique can be used for most questions featuring a population in which each member has two characteristics associated with it. Here, we have a population of people, and the two characteristics are: ...” December 30, 2018 Rich.C@EMPOWERgmat.com posted a reply to If it takes Jacob x hours to complete a project and it in the Problem Solving forum “Hi All, We''re told that it takes Jacob X hours to complete a project and it takes Mike Y hours to complete the same project. We''re asked for the number of hours it would take them to complete the project if they worked together. This is a great ''concept'' question; if you recognize the ...” December 29, 2018 Rich.C@EMPOWERgmat.com posted a reply to The employees of Smith Enterprises received wage increases in the Problem Solving forum “Hi All, We''re told that the employees of Smith Enterprises received wage increases ranging from 30 cents to 87.5 cents per hour. We''re asked for the MAXIMUM wage increase for a 40-hour week. This question comes down to some basic arithmetic (but you might find it faster to do your math in a ...” December 29, 2018 Rich.C@EMPOWERgmat.com posted a reply to Of the paintings that a certain artist created last year, th in the Problem Solving forum “Hi All, We''re told that of the paintings that a certain artist created last year, the number of paintings that were UNFRAMED was 5 times the number of paintings that were FRAMED and 48 percent of the UNFRAMED paintings and 30 percent of the FRAMED paintings were SOLD. We''re asked for the ...” December 29, 2018 Rich.C@EMPOWERgmat.com posted a reply to Before expansion, a zoo had 343 birds in 7 cages. If, after in the Problem Solving forum “Hi All, We''re told that BEFORE expansion, a zoo had 343 birds in 7 cages and AFTER the expansion was complete, there were 719 birds in 11 cages. We''re asked for the approximate percent increase in the average number of birds per cage. This question is based around a couple of standard math ...” December 29, 2018 Rich.C@EMPOWERgmat.com posted a reply to Scott takes a trip and drives 6 hours from Town X to Town Z in the Problem Solving forum “Hi All, We''re told that Scott takes a trip and drives 6 hours from Town X to Town Z at a rate of 50 miles per hour. On his way back, Scott drives 75 miles per hour and stops in Town Y which is MIDWAY between Town X and Town Z. We''re asked for the number of HOURS Scott takes to drive from Town ...” December 29, 2018 Rich.C@EMPOWERgmat.com posted a reply to A merchant paid$300 for a shipment of x identical in the Problem Solving forum
“Hi All, The information in the prompt include a variety of nice ''round'' numbers, so it''s likely that the number of calculators in the shipment is also a round number AND divides evenly into 300. Only two of the answers ''fit'' that idea - 25 and 30, so let''s TEST THE ANSWERS and see if ...”
December 29, 2018
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
Brent@GMATPrepNow posted a reply to Car X left Town T (RATE PROBLEM, Need Help) in the Problem Solving forum
“IMPORTANT: Let''s use HOURS throughout our solution, and then convert hours to minutes at the end. When car Y had traveled for z HOURS, car Y had traveled 23 miles more that car X had from the time that car X left Town T. z = car Y''s travel time in HOURS So, z + 3/10 = car X''s travel time in ...”
December 28, 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
Rich.C@EMPOWERgmat.com posted a reply to Fred has a jarful of nickels, dimes, and quarters, in the ra in the Problem Solving forum
“Hi All, We''re told that Fred has a jarful of nickels, dimes, and quarters, in the ratio of 2:5:10, respectively and the total value of these coins is $15.50. We''re asked for the number of DIMES in Fred’s jar. This question is based on ratio rules - and ratios are all about multiples - so you ...” December 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to A certain bank uses the formula above to approximate the in the Problem Solving forum “Hi All, We''re asked for the mathematical equivalent of the following formula: $$R=\frac{\frac{24F}{N}}{P+\frac{A}{12}}$$ While the prompt (and the answers) might look ''complex'', the work involved is based on a simple math premise (common denominators), so as long as you are thorough ...” December 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to What is the largest value of non-negative integer N for in the Problem Solving forum “Hi All, We''re asked for the largest value of N for which 10^N is a factor of 50! This question comes down to ''prime factorization'' and requires a degree of thoroughness on your part (to make sure that you find all of the 10s in 50!) To start, 50! = (50)(49)(48)(47)(46)(45).....(3)(2)(1), ...” December 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to A retailer sells pashminas at a ten percent discount. If a in the Problem Solving forum “Hi All, We''re told that a retailer sells pashminas at a ten percent discount, a pashmina COST him$75 and he wants to make a profit of no less than twenty percent on the COST (after the discount). We''re asked for the minimum tag price he needs to put on a pashmina. To start, this question ...”
December 27, 2018
Rich.C@EMPOWERgmat.com posted a reply to HELP!!! Very POOR VERBAL score. in the Suggestions and Feedback forum
“Hi Linda, Many Test Takers spend 3 months (or more) of consistent study time before they hit their ''peak'' scores, so you shouldn''t feel too down about this performance if you studied for just 6 weeks (and primarily just on the weekends). Thankfully, the GMAT is a consistent, predictable Exam, ...”
December 27, 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
Rich.C@EMPOWERgmat.com posted a reply to A set of 15 different integers has median of 25 and a range in the Problem Solving forum
“Hi All, When it comes to maximizing or minimizing a value in a group of numbers, you have to think about what the other numbers would need to be to accomplish your goal. Here, we have a group of 15 DISTINCT (meaning DIFFERENT) integers with a median of 25 and a RANGE of 25. That range will ...”
December 26, 2018
Rich.C@EMPOWERgmat.com posted a reply to A certain punch contains grape juice, orange juice, and in the Problem Solving forum
“Hi All, We''re told that a certain punch contains grape juice, orange juice, and pineapple juice and no other ingredients in a ratio of 2:3:7 respectively and a bowl contains 156 total ounces of this punch. We''re asked for the number of ounces of grape juice in the punch. This question can be ...”
December 26, 2018
Rich.C@EMPOWERgmat.com posted a reply to The sum of the weekly salaries of 5 employees is $3,250. If in the Problem Solving forum “Hi All, We''re told that the SUM of the weekly salaries of 5 employees is$3,250 and that each of the 5 salaries is to increase by 10 percent. We''re asked for the AVERAGE increase in weekly salary per employee. This question ultimately comes down to working through some arithmetic, but ...”
December 24, 2018
Rich.C@EMPOWERgmat.com posted a reply to 90 Day Flexible Plan for a decent verbal/low quant old score in the GMAT Strategy forum
“Hi LDCross, For free math practice and help, I recommend that you set up an account at Khan Academy (www.khanacademy.org). The site is completely free and makes the learning a bit more fun and ''game-like'' (as opposed to the dry academic approach taken by most books). While the site is vast, ...”
December 24, 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
Brent@GMATPrepNow posted a reply to A shipping company has four empty trucks that will head out in the Problem Solving forum
“Take the task of shipping the 4 boxes and break it into stages. Let''s call the 4 boxes A, B, C and D Stage 1: Select a truck to ship box A in There are 4 trucks from which to choose, so we can complete stage 1 in 4 ways Stage 2: Select a truck to ship box B in There are 4 trucks ...”
December 24, 2018
Brent@GMATPrepNow posted a reply to resolution in the Data Sufficiency forum
“ Given: A quorum of at least half the 20 directors must pass the resolution by at least a two-thirds majority Target question: At a meeting of the board of directors, did resolution X pass or fail?  Statement 1: Ten directors voted for the resolution.  KEY: We don''t know how many ...”
December 23, 2018
Rich.C@EMPOWERgmat.com posted a reply to A plane traveled k miles in its first 96 minutes of flight in the Problem Solving forum
“Hi All, We''re told that a plane traveled K miles in its first 96 minutes of flight time and it completed the remaining 300 miles of the trip in T minutes. We''re asked for the average speed of the plane, in miles per hour, for the entire trip. This question can be solved by TESTing VALUES. ...”
December 23, 2018
Brent@GMATPrepNow posted a reply to a data from gmat forum in the Data Sufficiency forum
“ Given: Every student at the Performing Arts Academy must take at least one of the two drama courses offered, Classical Theater or Improvisation. 15% of the students who take Classical Theater also take Improvisation Let''s use the Every student at the Performing Arts Academy must take at least ...”
December 23, 2018
Brent@GMATPrepNow posted a reply to Tough Rate problem in the Data Sufficiency forum
“ Given: At a certain department store present-wrapping counter, each clerk will wrap no fewer than twenty and no more than thirty presents per hour. Target question: If seventy people are standing in line, will all of their presents be wrapped after one hour? Statement 1: Each person in ...”
December 23, 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
Rich.C@EMPOWERgmat.com posted a reply to A scientist has 400 units of a 6% phosphoric acid solution, in the Problem Solving forum
“Hi All, While an Algebra approach (using the "weighted average" formula) would work nicely on this prompt, you can also answer it rather quickly by TESTing THE ANSWERS and using a bit of logic. Here, we''re going to mix 400 ounces of a 6% acid solution with X ounces of a 12% acid ...”
December 22, 2018
Brent@GMATPrepNow posted a reply to Two trees have a combined height of 60 feet, and the taller in the Problem Solving forum
“Let y = the height of the shorter tree The taller tree is x times the height of the shorter tree. Ho So, yx = the height of the taller tree The two trees have a combined height of 60 feet We can write: y + yx = 60 How tall is the shorter tree, in terms of x? We must solve the equation ...”
December 22, 2018
Rich.C@EMPOWERgmat.com posted a reply to Two water pumps, working simultaneously at their respective in the Problem Solving forum
“Hi All, This is an example of a Work Formula question. Any time you have two entities (people, machines, water pumps, etc.) working on a job together, you can use the following formula: (AB)/(A+B) = Total time to do the job together Here, we''re told that the total time = 4 hours and ...”
December 22, 2018
Rich.C@EMPOWERgmat.com posted a reply to Two trees have a combined height of 60 feet, and the taller in the Problem Solving forum
“Hi All, We''re told that two trees have a combined height of 60 feet and the taller tree is X times the height of the shorter tree. We''re asked to find the height of the shorter tree in terms of X. This question can be approached in a couple of different ways, including by TESTing VALUES. IF ...”
December 22, 2018
Brent@GMATPrepNow posted a reply to Two water pumps, working simultaneously at their respective in the Problem Solving forum
“Let''s pick some nice numbers that adhere to the given information. ...the constant rate of one pump was 1.5 times the constant rate of the other So, the fast pump has a pumping rate that''s 1.5 faster then the slow pump. So, let''s say the SLOW pump pumps at 2 gallons per hour This means ...”
December 22, 2018
Brent@GMATPrepNow posted a reply to Fractions/Ratios in the Data Sufficiency forum
“ Given: There are two types of rolls on a counter, plain rolls and seeded rolls. Let P = # of plain rolls Let S = # of seeded rolls Target question: What is the value of P + S? Statement 1: The ratio of the number of seeded rolls on the counter to the number of plain rolls on the ...”
December 21, 2018
Brent@GMATPrepNow posted a reply to Five friends - Ross, Phoebe, Chandler, Joey and Monica - in the Problem Solving forum
“Take the task of feeding the 5 friends and break it into stages. We’ll begin with the most restrictive stage(s). Stage 1: Select a pizza for Phoebe Since Phoebe will only eat Margherita pizza, there''s only 1 pizza we can serve her. So, we can complete stage 1 in 1 way Stage 2: ...”
December 21, 2018
Brent@GMATPrepNow posted a reply to A list kept at Town Hall contains that town's average daily in the Data Sufficiency forum
“Target question: Does this month have 30 or 31 days? IMPORTANT: Notice that the question does not ask "How many days are in this month?" If that were the case, then we''d have to consider February. Instead, the question is ruling out February by basically telling us that the month in ...”
December 20, 2018
Brent@GMATPrepNow posted a reply to In how many ways can the letters D, I, G, I, T be arranged in the Problem Solving forum
“One approach is to count all possible arrangements (that may or may not break the given rule) and then subtract all outcomes the break the rule. Here''s another approach. Take the task of arranging the 5 letters and break it into stages. Stage 1: Arrange the 3 CONSONANTS (D, G and T) in a ...”
December 20, 2018
Brent@GMATPrepNow posted a reply to Inequalities in the GMAT Math forum
“Target question: Is x² > y²? Statement 2: x > y There are several values of x and y that satisfy statement 2. Here are two: Case a: x = 2 and y = 1. In this case, x² = 4 and y² = 1. So, the answer to the target question is YES, x² IS greater than y² Case b: x = -2 and y = -3. ...”
December 20, 2018
Rich.C@EMPOWERgmat.com posted a reply to A certain company charges $6 per package to ship packages in the Problem Solving forum “Hi All, We''re told that a certain company charges$6 per package to ship packages weighing less than 2 pounds each. However, for a package weighing 2 pounds or more, the company charges an initial fee of $6 plus$2 per pound. We''re told that a certain package cost $38 to ship. We''re asked for ...” December 20, 2018 Rich.C@EMPOWERgmat.com posted a reply to One woman and one man can build a wall together in two hours in the Problem Solving forum “Hi All, Each of the other explanations explains the ''math'' behind this prompt, so I won''t rehash any of that here. Instead, I want to talk about the ''patterns'' behind this question, and how you can answer it without doing much math at all. To start, we have to sort through a lot of ...” December 20, 2018 Rich.C@EMPOWERgmat.com posted a reply to Before being simplified, the instructions for computing in the Problem Solving forum “Hi All, This question can be solved by TESTing VALUES. I''m going to use the variable "J" instead of an "I" (since that might be mistaken for the number 1)... We''re told to add "2% of one''s income" to "the average of 100 and 1% of one''s income" ...” December 20, 2018 Rich.C@EMPOWERgmat.com posted a reply to At the Trenchard Oaks apartment complex, a two-bedroom apart in the Problem Solving forum “Hi All, We''re told that a two-bedroom apartment costs 50% more to rent than a one-bedroom apartment. If Alex were to rent a two-bedroom apartment for X months it would cost him the same amount as it would to rent a one-bedroom for 12 months. We''re asked for the value of X. This question can be ...” December 20, 2018 Rich.C@EMPOWERgmat.com posted a reply to 90 Day Flexible Plan for a decent verbal/low quant old score in the GMAT Strategy forum “Hi LDCross, This 610 is a strong initial CAT Score (the average Score on the Official GMAT hovers around 550 most years) - and your Verbal Scaled Score is fantastic. As such, you might just need to put the proper focus/effort into building up your Quant knowledge and learning/practicing the ...” December 20, 2018 Brent@GMATPrepNow posted a reply to If sequence S has 120 terms, what is the 105th term of S? in the Data Sufficiency forum “Target question: What is the 105th term of S? Given: Sequence S has 120 terms Statement 1: The first term of S is −8. We have no information about the nature of the sequence. So, knowing the value of term 1 won''t help is determine the value of term 105 Since we cannot answer the ...” December 20, 2018 Brent@GMATPrepNow posted a reply to Two dice, each with six sides numbered 1 through 6, are toss in the Problem Solving forum “P(both dice will come up with either a 1 or a 2) = P(1st die is 1 or 2 AND 2nd die is 1 or 2) = P(1st die is 1 or 2) x P(2nd die is 1 or 2) = 2/6 x 2/6 = 1/3 x 1/3 = 1/9 Answer: C Cheers, Brent” December 20, 2018 Brent@GMATPrepNow posted a reply to At the Trenchard Oaks apartment complex, a two-bedroom apart in the Problem Solving forum “A fast and easy approach is to assign a "nice" value to the monthly rent of a ONE-bedroom apartment. Let''s say the rent on a ONE-bedroom apartment is$100 per month A two-bedroom apartment costs 50% more to rent than a one-bedroom apartment 50% of $100 =$50 So, the rent on a ...”
December 20, 2018
Brent@GMATPrepNow posted a reply to If the remainder when positive integer x is divided by 7 is in the Data Sufficiency forum
“Target question: What is the value of x? Given: If the remainder when positive integer x is divided by 7 is 4 When it comes to remainders, we have a nice rule that says: If N divided by D leaves remainder R, then the possible values of N are R, R+D, R+2D, R+3D,. . . etc. For ...”
December 20, 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
Brent@GMATPrepNow posted a reply to The value of a share was 25% less in the 2nd quarter over in the Problem Solving forum
“Let''s assign a nice value to the share value in the 1st quarter. Let''s say the share value in the 1st quarter = $100 The value of a share was 25% less in the 2nd quarter over the 1st quarter . . . So, the share value in the 2nd quarter =$100 - (25% of $100) =$100 - $25 =$75 . . . ...”
December 20, 2018
Brent@GMATPrepNow posted a reply to The usual price of a bagel was reduced during a sale. How in the Data Sufficiency forum
“Target question: How much money could be saved by purchasing 10 bagels at the sale price rather than at the usual price? Statement 1: The usual price for a bagel is $0.50 per bagel. Since there''s no information about the SALE price, there''s no way to calculate the amount saved. Since we ...” December 20, 2018 Brent@GMATPrepNow posted a reply to One woman and one man can build a wall together in two hours in the Problem Solving forum “One approach is to determine the size of the job One woman and one man can build a wall together in two hours, but the woman would need the help of two girls in order to complete the same job in the same amount of time. The part in blue tells us that 2 girls have the same output as 1 man. ...” December 19, 2018 Brent@GMATPrepNow posted a reply to Is x > 0 ? (1) |x+3| < 4 (2) |x-3| < 4 in the Data Sufficiency forum “When solving inequalities involving ABSOLUTE VALUE, there are 2 things you need to know: Rule #1: If |something| < k, then –k < something < k Rule #2: If |something| > k, then EITHER something > k OR something < -k Target question: Is x > 0 ? Statement 1: |x+3| < ...” December 19, 2018 Brent@GMATPrepNow posted a reply to In the xy-plane, what is the y-intercept of line l? in the Data Sufficiency forum “Target question: What is the y-intercept of line L? IMPORTANT: When I scan the two statements, I see that they are strongly related. If the x-intercept is -1/3 (as per statement 2), the slope of the line is GUARANTEED to be 3 times its y-intercept (as per statement 1). Here''s why... ...” December 19, 2018 Brent@GMATPrepNow posted a reply to At garage sale, all of the prices of the items sold were in the Problem Solving forum “The price of the radio was the 15th highest price So, there were 14 items that were more expensive than the radio. In other words, if we listed all of the prices in ascending order, we''d get something like: ........... radio, X, X, X, X, X, X, X, X, X, X, X, X, X, X The price of the radio ...” December 19, 2018 Brent@GMATPrepNow posted a reply to A certain company charges$6 per package to ship packages in the Problem Solving forum
“Let x = the weight of the package (in pounds) So, the shipping cost = $6 + 2x We''re told the shipping cost is$38. So, we can write: 6 + 2x = 38 Subtract 6 from both sides: 2x = 32 Solve: x = 32/2 = 16 Answer: A Cheers, Brent”
December 19, 2018
Brent@GMATPrepNow posted a reply to Is x/y>1? in the Data Sufficiency forum
“Target question: Is x/y > 1? Statement 1: x > y Let''s TEST some values. There are several values of x and y that satisfy statement 1. Here are two: Case a: x = 3 and y = 1. In this case, x/y = 3/1 = 3. So, the answer to the target question is YES, x/y IS greater than 1 Case b: x = ...”
December 19, 2018
Brent@GMATPrepNow posted a reply to How many 4-digit numbers greater than 3,000 have the digits: in the Problem Solving forum
“Take the task of creating 4-digit numbers and break it into stages. We’ll begin with the most restrictive stage. Stage 1: Select the first digit (to go in the thousands place) Since the 4-digit number must be GREATER THAN 3000, the first digit must be greater than or equal to 3 This means ...”
December 19, 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 Brent@GMATPrepNow posted a reply to Bite-sized video lessons from GMAT Prep Now in the GMAT Math forum “Shortcut for quickly dividing by 5 in your head Video: https://www.youtube.com/watch?v=fK29jTSJOi8 Cheers, Brent” December 18, 2018 Rich.C@EMPOWERgmat.com posted a reply to In the set of positive integers from 1 to 500, what is the s in the Problem Solving forum “Hi All, We''re asked for the sum of all the ODD multiples of 5 from 1 to 500. This question is essentially about Arithmetic and can be solved with ''bunching.'' There are 100 multiples of 5 between 1 and 500: 1(5)..... (100)(5), but the question asks for only the ODD multiples of 5 (meaning ...” December 18, 2018 Brent@GMATPrepNow posted a reply to At a certain university, the ratio of the number of teaching in the Problem Solving forum “We can solve this using equivalent ratios We''re comparing teaching assistants/number of students Let x = number of students possible We can write: 5/x = 3/80 Cross multiply to get: 3x = (5)(80) Simplify: 3x = 400 Solve: x = 400/3 = 133 1/3 = 133.3333 Since 134 students would exceed ...” December 18, 2018 Brent@GMATPrepNow posted a reply to Automobile A is traveling at two-thirds the speed that in the Data Sufficiency forum “ Given: Automobile A is traveling at two-thirds the speed that Automobile B is traveling. Let A = Car A''s speed Let B = Car B''s speed So, we can write: A = (2/3)B Target question: What is the value of A? Statement 1: If both automobiles increased their speed by 10 miles per hour, ...” December 18, 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 Rich.C@EMPOWERgmat.com posted a reply to Seven students are trying out for the school soccer team, on in the Problem Solving forum “Hi alanforde800Maximus, This question uses what''s called "Formal Logic" (a concept that you would see repeatedly on the LSAT, but rarely on the GMAT). You can answer it with some drawings and careful note-taking. Based on the information in the prompt, we have seven players ...” December 17, 2018 Rich.C@EMPOWERgmat.com posted a reply to Pam and Robin each roll a pair of fair, six-sided dice. What in the Problem Solving forum “Hi alanforde800Maximus, This is a tougher probability question than average (and you likely will not see this exact situation on Test Day). This is meant to say that you shouldn''t be too concerned about this prompt until you''re picking up points in all the other ''gettable'' areas first. ...” December 17, 2018 Rich.C@EMPOWERgmat.com posted a reply to If every boy in a kindergarten class buys a soda and every g in the Problem Solving forum “Hi alanforde800Maximus, This is a thick, layered question, and would likely take most Test Takers more time than average to solve correctly. The key to solving it is to realize that we don''t know the prices of each soda and each juice box - they MIGHT be integers, but they MIGHT NOT. Also, we ...” December 17, 2018 Rich.C@EMPOWERgmat.com posted a reply to Post-First Exam: What are my next steps? in the GMAT Strategy forum “Hi andyaf, In your prior posts, you did not offer much information about your overall goals (other than that your Goal Score was 750+). Before I can offer you any additional advice, it would help if you could provide a bit more information on your timeline and your goals: 1) Is your Goal ...” December 17, 2018 Rich.C@EMPOWERgmat.com posted a reply to 90 Day Flexible Plan for a decent verbal/low quant old score in the GMAT Strategy forum “Hi LDCross, Earlier this year, GMAC made a formal announcement defining some changes that would be taking place to the format of the Official GMAT (which began April 16, 2018). These changes primarily impact the overall length of the Exam (meaning the number of questions in the Quant and Verbal ...” December 17, 2018 Brent@GMATPrepNow posted a reply to If every boy in a kindergarten class buys a soda and every g in the Problem Solving forum “Let B = # of boys in kindergarten Let G = # of girls in kindergarten Let J = price (in CENTS) of ONE juice box Let S = price (in CENTS) of ONE soda If every boy in a kindergarten class buys a soda and every girl in the same class buys a juice box, the class will spend 1¢ less in total than it ...” December 17, 2018 Brent@GMATPrepNow posted a reply to Sanjana jogged uphill for a while at an average speed of 3 m in the Problem Solving forum “You could also try testing the answer choices. Cheers, Brent” December 17, 2018 Brent@GMATPrepNow posted a reply to If 3x + 12 = 21, then x + 4 = A. 3 B. 4 C. 5 D. 7 E. 9 in the Problem Solving forum “One option is to first solve the equation, 3x + 12 = 21, for x, and then determine the value of x+4. Alternatively, we can factor the left side to get: 3(x + 4) = 21 Now divide both sides by 3 to get: x + 4 = 7 Answer: D Cheers, Brent” December 17, 2018 Brent@GMATPrepNow posted a reply to If a, b & c are integers, is abc odd? in the Data Sufficiency forum “Some important rules: #1. (ODD)(ODD) = ODD #2. (ODD)(EVEN) = EVEN #3. (EVEN)(EVEN) = EVEN Given: a, b & c are integers Target question: Is abc odd? Statement 1: ab is odd This tells us that a and b are both odd. However, we have no information about c. Consider these two ...” December 17, 2018 Brent@GMATPrepNow posted a reply to In the coordinate plane, the y-intercept of the line k is eq in the Problem Solving forum “One approach is to choose some values that meet the given information. In the coordinate plane, the y-intercept of the line k is equal to twice its slope. Okay, so let''s say the y-intercept of line k is 6. We get: https://i.imgur.com/qJ5GeRQ.png Since the y-intercept (6) is TWICE the ...” December 17, 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 Brent@GMATPrepNow posted a reply to Sanjana jogged uphill for a while at an average speed of 3 m in the Problem Solving forum “Let''s start with a "Word Equation" (distance traveled uphill) + (distance traveled downhill) = TOTAL DISTANCE Let t = the time spent jogging UPHILL (in hours) The total travel time = 40 minutes = 2/3 HOURS So, 2/3 - t = the time spent jogging DOWNHILL (in hours) Distance = ...” December 16, 2018 Brent@GMATPrepNow posted a reply to If one manual weighs 400 grams, how many kilograms does a in the Problem Solving forum “Since the answer choices are VERY SPREAD APART, we can be quite aggressive with our ESTIMATION. (400 grams)(50 manuals) = 20,000 grams = 20 KILOgrams So, the answer is approximately 20 Answer: C Cheers, Brent” December 16, 2018 Rich.C@EMPOWERgmat.com posted a reply to In 1991, the price of a house was 80% of its original price. in the Problem Solving forum “Hi All, We''re told that in 1991, the price of a house was 80% of its original price and in 1992, the price of the house was 60% of its original price. We''re asked by what percent the price of the house decreased from 1991 to 1992. This question can be solved in a couple of different ways, ...” December 16, 2018 Rich.C@EMPOWERgmat.com posted a reply to A mathematician has devised a formula that produces a series in the Problem Solving forum “Hi All, In this question, we''re given the ''rules'' for a particular sequence. We have the values of the first 3 terms and instructions for how to calculate each term afterwards (re: the 4th term is the sum of TWICE the term before it and the term ''2 terms'' before it - re: 2(3rd term) + 2nd ...” December 16, 2018 Rich.C@EMPOWERgmat.com posted a reply to Each Machine of type A has 3 steel parts and 2 chrome parts. in the Problem Solving forum “Hi All, We''re told that each Machine of type A has 3 steel parts and 2 chrome parts, each machine of type B has 4 steel parts and 7 chrome parts and a certain group of type A and type B machines has a total of 20 steel parts and 22 chrome parts. We''re asked for the total number of machines. ...” December 16, 2018 Rich.C@EMPOWERgmat.com posted a reply to The main ingredient in a certain prescription drug capsule in the Problem Solving forum “Hi All, We''re told that the main ingredient in a certain prescription drug capsule cost$500 per kilogram. If each capsule contains 600 milligrams of ingredient, what is the cost of the ingredient in a capsule? (1 kilogram = 10^6 milligrams). This is a ''unit conversion'' question and comes ...”
December 16, 2018
Rich.C@EMPOWERgmat.com posted a reply to how to ace GMAT in the GMAT Strategy forum
“Hi Sana Mehra, Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you''ve been studying and your goals: Studies: 1) What type of study routine have you followed? How many hours do you typically study each ...”
December 16, 2018
Brent@GMATPrepNow posted a reply to Madge paid A dollars for R bananas. Dean paid B dollars for in the Data Sufficiency forum
“ Given: Madge paid A dollars for R bananas. Dean paid B dollars for S bananas. Target question: Which one of them paid a higher price-per-banana? Statement 1: B > A This tells us that Dean PAID more than Madge paid. However, we don''t know HOW MANY bananas each person bought. ...”
December 15, 2018
Brent@GMATPrepNow posted a reply to Jason's salary and Karen's salary were each p percent in the Data Sufficiency forum
“Target question: What is the value of p? Given: Jason''s salary and Karen''s salary were each p percent greater in 1998 than in 1995. IMPORTANT: If my 1998 salary is p percent greater than my 1995 salary, then: 1998 salary = (1 + p/100)(1995 salary) For example, if my 1998 salary is 7 percent ...”
December 15, 2018
Brent@GMATPrepNow posted a reply to If w + 2x = 150, 2w + 3y = 100, and x + 3z = 50, what is the in the Problem Solving forum
“GIVEN: w + 2x = 150 2w + 3y = 100 x + 3z = 50 If we add all 3 equations, we get: 3w + 3x + 3y + 3z = 300 Divide both sides by 3 to get: w + x + y + z = 100 Answer: D Cheers, Brent”
December 15, 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
Brent@GMATPrepNow posted a reply to If A is the center of the circle shown above and AB = BC in the Problem Solving forum
“First recognize that all radii (indicated with BLUE lines) have equal length https://i.imgur.com/iz8ur0Z.png Since BC and CD are both equal to the radius AB, we can see that all BLUE lines have equal length https://i.imgur.com/mF0UxTp.png This means the 2 blue triangles are EQUILATERAL ...”
December 13, 2018
Brent@GMATPrepNow posted a reply to If m and n are positive integers, is mn an even number? in the Data Sufficiency forum
“Some important rules: #1. ODD +/- ODD = EVEN #2. ODD +/- EVEN = ODD #3. EVEN +/- EVEN = EVEN #4. (ODD)(ODD) = ODD #5. (ODD)(EVEN) = EVEN #6. (EVEN)(EVEN) = EVEN Target question: Is mn an even number? Given: m and n are positive integers Statement 1: m/n is an even number. ...”
December 13, 2018
Brent@GMATPrepNow posted a reply to What distance did Jane travel? in the Data Sufficiency forum
“Target question: What distance did Jane travel? Statement 1: Bill traveled 40 miles in 40 minutes. No info about Jane Statement 1 is NOT SUFFICIENT Statement 2: Jane traveled at the same average rate as Bill We don''t know Bill''s speed (rate) Statement 2 is NOT SUFFICIENT ...”
December 13, 2018
Rich.C@EMPOWERgmat.com posted a reply to Test day in the GMAT Strategy forum
December 13, 2018
Brent@GMATPrepNow posted a reply to If Mike buys a biclycle and a helmet for a total cost of in the Data Sufficiency forum
“Target question: How much does the helmet cost? Given: bicycle + helmet = $315 Statement 1: The bicycle costs twice as much as the helmet. Let x = cost of helmet So, 2x = cost of bicycle Since the total cost is$315, we can write: x + 2x = 315 Simplify: 3x = 315 Solve: x = 315/3 = ...”
December 13, 2018
Rich.C@EMPOWERgmat.com posted a reply to Test day in the GMAT Strategy forum
“Hi Esteban, Is your Official Score in the ''competitive range'' of what those Schools are looking for? If it''s not, and you want to retest, then you''ll have to be really efficient with the time that you have remaining before the Round 2 application deadlines. You might choose to purchase ...”
December 13, 2018
Brent@GMATPrepNow posted a reply to In isosceles triangle DEF, what is the measure of angle E? in the Data Sufficiency forum
“Target question: What is the measure of ∠E? Given: Triangle DEF is an ISOSCELES triangle This tells us that there are 2 equal angles Statement 1: ∠D measures 42 degrees Here it''s hard to tell whether there''s a second 42-degree angle or whether the other two angles are different. ...”
December 12, 2018
Brent@GMATPrepNow posted a reply to Ramon wants to cut a rectangular board into identical square in the Problem Solving forum
“If we aren''t wasting any wood, the length and width must be divisible by one side of the square So, this question is a clever way of asking us what the greatest common divisor (GCD) of 18 and 30 The GCD of 18 and 30 is 6, so if we cut squares that are 6 x 6, then we won''t waste any wood. We ...”
December 12, 2018
ceilidh.erickson posted a reply to GMAT Experience - Looking for advice in the I just Beat The GMAT! forum
“Your scores have been pretty inconsistent, with both quant & verbal fluctuating a lot. Given that, a 660 result is not surprising. Inconsistency on quant almost always indicates CARELESS ERRORS or sloppy technique - sometimes you get lucky, sometimes you don''t. A lot of students brush off ...”
December 12, 2018
ceilidh.erickson posted a reply to 660 GMAT - What are my odds? in the The Application Process forum
“It really depends on where you''re applying, and how much you stand out against other applicants in the pool. For example, applicants from France might be underrepresented in certain pools, as opposed to applicants from other countries. I''d recommend doing free consultations with any admissions ...”
December 12, 2018
ceilidh.erickson posted a reply to Test day in the GMAT Strategy forum
“For anyone else with questions about test day & scores, here''s an article I wrote: https://www.manhattanprep.com/gmat/blog/scheduling-your-gmat-everything-you-need-to-know-about-booking-cancelling-reporting-etc/”
December 12, 2018
Brent@GMATPrepNow posted a reply to How many perfect squares lie between 2^4 and 2^8, inclusive? in the Problem Solving forum
“First rewrite 2^4 and 2^8 as SQUARES of integers (aka perfect squares) 2^4 = (2²)² = 4² 2^8 = (2^4)² = 16² So, we want to find the number of perfect squares FROM 4² to 16² inclusive Let''s list them: 4², 5², 6², 7², 8², 9², 10², 11², 12², 13², 14², 15², and 16² There are ...”
December 12, 2018
Brent@GMATPrepNow posted a reply to If 5x + 3y = 17, what is the value of x? in the Data Sufficiency forum
“Target question: What is the value of x? Given: 5x + 3y = 17 Statement 1: x is a positive integer Let''s TEST some values. There are several values of x and y that satisfy statement 1. Here are two: Case a: x = 1 and y = 4 (these values satisfy the given equation, 5x + 3y = 17). In ...”
December 12, 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
Rich.C@EMPOWERgmat.com posted a reply to If the ratio of the present age of Anna and Paula is 1 : 2, in the Problem Solving forum
“Hi All, We''re told that the ratio of Anna''s and Paula''s CURRENT ages is 1:2. We''re asked which of the following COULD have been the ratio of their respective ages 8 years ago. This question can be solved in a couple of different ways, including by ''brute force'' Arithmetic. Since we''re ...”
December 11, 2018
Rich.C@EMPOWERgmat.com posted a reply to The table above shows the number of students in three clubs in the Problem Solving forum
“Hi All, 3-Group Overlapping Sets questions are relatively rare on the Official GMAT (you likely will NOT see this version of Overlapping Sets on Test Day). However, there is a formula that you can use to solve it. Total = (1st group) + (2nd group) + (3rd group) - (1st and 2nd) - (1st and ...”
December 11, 2018
Rich.C@EMPOWERgmat.com posted a reply to Test day in the GMAT Strategy forum
“Hi Esteban, How did you Score (including the Quant and Verbal Scaled Scores)? And are you planning to apply soon (sometime in the next couple of months)? GMAT assassins aren''t born, they''re made, Rich”
December 11, 2018
Brent@GMATPrepNow posted a reply to How many integers between 324,700 and 458,600 have tens in the Problem Solving forum
“We want to determine how many integers end in 13 For example, 324713, 324813, 324913, 325013, . . . etc. Recognize that, for every 100 consecutive integers, only 1 will end in 13. There are 133,900 integers between 324,700 and 458,600 (since 458,600 - 324,700 = 133,900) Of those 133,900 ...”
December 11, 2018
Brent@GMATPrepNow posted a reply to The quadrilateral ABCD is a square with sides of length 12. in the Problem Solving forum
“This question could take a while to answer (especially if you don''t know where to begin! :-). Fortunately, we can take advantage of an IMPORTANT feature about geometric diagrams on the GMAT: The diagrams in GMAT problem solving questions are DRAWN TO SCALE unless stated otherwise. We have ...”
December 11, 2018
Brent@GMATPrepNow posted a reply to A palindrome is a number that reads the same forward and in the Problem Solving forum
“Take the task of building palindromes and break it into stages. Stage 1: Select the ten-thousands digit We can choose 1, 2, or 3 So, we can complete stage 1 in 3 ways Stage 2: Select the thousands digit We can choose 1, 2, or 3 So, we can complete stage 2 in 3 ways Stage 3: Select ...”
December 11, 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
Brent@GMATPrepNow posted a reply to This year, a woman has a lucrative one-year position. During in the Problem Solving forum
“Let T = the woman''s total salary for the year During this year, she will give a fraction f of her salary to her husband, a private investor, to invest and they will live this year on the remainder. So, the amount SAVED (and then given to huspand)= fT This means the amount SPENT = T - fT ...”
December 11, 2018
Brent@GMATPrepNow posted a reply to A frog is climbing a greasy pole. The frog can climb 2 in the Problem Solving forum
“Let''s solve this by making table Time elapsed | height 1 hours | 4 cm 2 hours | 8 cm REST (slide) 2.5 hours | 7 cm 3.5 hours | 11 cm 4.5 hours | 15 cm REST (slide) 5 hours | 14 cm 6 hours | 18 cm 7 hours | 22 cm REST (slide) 7.5 hours | 21 cm 8.5 hours | 25 cm 9.5 hours | 29 cm ...”
December 11, 2018
Brent@GMATPrepNow 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: oil: vinegar : water = 3 : 2 : 1 Let''s first try to use ALL 8 cups of oil Take 3 : 2 : 1 and multiply all 3 parts by 8/3 to get the EQUIVALENT ratio 8 : 16/3 : 8/3 Simplify to get: 8 : 5 1/3 : 2 2/3 So, in this case, the dressing is comprised of 8 cups of oil, 5 1/3 cups of vinegar, ...”
December 10, 2018
Brent@GMATPrepNow posted a reply to Line DB divides Rectangle ABCD into two equal triangles. Is in the Data Sufficiency forum
“IF all 4 sides of the rectangle have EQUAL length (i.e,, the shape is a square), then the diagonal will create two 45-45-90 right triangles. However, if the sides are not all the same length, the resulting triangles will NOT be 45-45-90 right triangles. Cheers, Brent”
December 10, 2018
Brent@GMATPrepNow posted a reply to A father distributed his total wealth to his two sons. How in the Data Sufficiency forum
“ Given: A father distributed his total wealth to his two sons. Target question: How much wealth did the father have? Statement 1: The elder son received 3/5 of the wealth. Without any dollar values, there''s no way to answer the target question with certainty. So, statement 1 is NOT ...”
December 10, 2018
Brent@GMATPrepNow posted a reply to At what speed was Erik running when he was at the halfway po in the Data Sufficiency forum
“IMPORTANT: The two statements essentially provide the exact same information. If it took Erik 2 hours to travel 10 miles, we can conclude that his average speed was 5 miles per hour. When the two statements provide the same information in a Data Sufficiency question, the correct answer must be ...”
December 10, 2018
Brent@GMATPrepNow posted a reply to [x] is the greatest integer less than or equal to x. What is in the Data Sufficiency forum
“Here are a few similar questions to practice with: - https://www.beatthegmat.com/if-is-the-greatest-integer-less-than-or-equal-to-x-what-t302459.html - https://www.beatthegmat.com/g-x-is-the-greatest-integer-less-than-or-equal-to-x-t298237.html - ...”
December 10, 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
Rich.C@EMPOWERgmat.com posted a reply to Test day in the GMAT Strategy forum
“Hi Esteban, The Program has a searchable database, so you don''t have to memorize any codes for the Schools that you want to send your Official GMAT Score to. Is your Official Test Date coming up (and when are you scheduled to take the Test?)? GMAT assassins aren''t born, they''re made, Rich”
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
Rich.C@EMPOWERgmat.com posted a reply to When 6 is multiplied by x, the result is the same as when x in the Problem Solving forum
“Hi All, We''re told that when 6 is multiplied by X, the result is the SAME as when X is added to 9. We''re asked for the value of X/3. When dealing with GMAT questions, it''s important to make sure that you answer the question that is ASKED. Here, we''re NOT asked for the value of X, we''re ...”
December 9, 2018
Brent@GMATPrepNow posted a reply to When 6 is multiplied by x, the result is the same as when x in the Problem Solving forum
“When 6 is multiplied by x, the result is the same as when x is added to 9 In other words: 6x = 9 + x Subtract x from both sides: 5x = 9 Divide both sides by 5 to get: x = 9/5 Answer: E Cheers, Brent”
December 9, 2018
Brent@GMATPrepNow posted a reply to Three photographers, Lisa, Mike and Norm, take photos of a w in the Problem Solving forum
“We can also solve the question using 1 variable Norms photos number 10 more than twice the number of Lisa''s photos Let x = the number of photographs that Lisa took. So, 2x + 10 = the number of photographs that Norm took. The total of Lisa and Mikes photos is 50 less than the sum of ...”
December 9, 2018
Brent@GMATPrepNow posted a reply to At a certain factory, each employee working the second shift in the Problem Solving forum
“Let''s assign a "nice" value to the number of widgets made by ONE employee. We''ll also assign a nice value to the number of employees on each shift. At a certain factory, each employee working the SECOND shift produced 2/3 as many widgets as each employee working the FIRST shift. ...”
December 9, 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
Brent@GMATPrepNow posted a reply to If two of the four expressions x+y, x+5y, x-y, and 5x-y are in the Problem Solving forum
“Okay, first recognize that x² - (by)² is a DIFFERENCE OF SQUARES. Here are some examples of differences of squares: x² - 25y² 4x² - 9y² 49m² - 100k² In general, we can factor differences of squares as follows: a² - b² = (a-b)(a+b) So . . . x² - 25y² = (x+5y)(x-5y) 4x² - ...”
December 8, 2018
ceilidh.erickson posted a reply to If all of the telephone extensions in a certain company must in the Problem Solving forum
“Here is yet another solution: Most of the time when we''re arranging n things (people in a line, letter combinations, etc) with a diminishing pool (i.e. we can''t use the same item twice), the number of arrangements is simply n!. If we could arrange these 4 numbers into extensions without any ...”
December 7, 2018
ceilidh.erickson posted a reply to Arthmetic subsequent value Problem Solving question in the Problem Solving forum
“If each row had 2 more spaces than the previous, we could imagine this as CONSECUTIVE SUM formula: sum = (average)(# of terms) The average of a consecutive set = the average of the endpoints --> (biggest + smallest)/2 The # of terms = the difference between the biggest and the smallest, divided ...”
December 7, 2018
ceilidh.erickson posted a reply to Goronian lawmaker: Goronia's Cheese Importation Board, the a in the Critical Reasoning forum
“For more on this YES / NO test for EVALUATE questions, see: https://www.beatthegmat.com/guitar-strings-often-go-dead-become-less-respon-t304393.html#820897 https://www.beatthegmat.com/because-of-a-rare-type-of-fungus-that-killed-off-many-cacao-t304283.html#820187”
December 7, 2018
ceilidh.erickson posted a reply to Goronian lawmaker: Goronia's Cheese Importation Board, the a in the Critical Reasoning forum
“When we''re asked to EVALUATE an argument, we need to establish the conclusion of the argument and its supporting premises. We then need to determine what information is MISSING. Premises: - Goronia''s Cheese Importation Board rejects about one percent of the cheese that it inspects. - the ...”
December 7, 2018
ceilidh.erickson posted a reply to 700-800 Level Questions in the GMAT Math forum
“If you''re looking for ultra-difficult problems to practice with, I recommend checking out the Manhattan Prep Advanced Quant guide. (Forgive the plug. As yet, there''s no easy way to access OG problems by difficulty level). This book contains strategies that specifically pertain to high-level ...”
December 7, 2018
Brent@GMATPrepNow posted a new topic called CHALLENGE: What is the value of k? in the Data Sufficiency forum
“What is the value of k? $$(1) k^2-5k-66=0$$ $$(2) \frac{2k}{k^2+5k}=\frac{1}{8}$$ Source: www.gmatprepnow.com Answer: B Estimated difficulty level: 600-650”
December 7, 2018
ceilidh.erickson posted a reply to Economist: On average, the emergency treatment for an elderl in the Critical Reasoning forum
“This argument style is very common on the GMAT: it compares 2 things (cost of emergency care v. cost of therapeutic program) but fails to take into account any other factors. Here are some other CR questions with similar logical flaws: ...”
December 7, 2018
ceilidh.erickson posted a reply to Economist: On average, the emergency treatment for an elderl in the Critical Reasoning forum
“To WEAKEN an argument, we must first find the logical flaws / unstated assumptions in the argument. Premises: - On average, the emergency treatment for an elderly person for injuries resulting from a fall costs $11,000. - A new therapeutic program can significantly reduce an elderly person''s ...” December 7, 2018 ceilidh.erickson posted a reply to OG 2018 Difficulty level for questions? in the GMAT Math forum “GMAC has not published difficulty levels for any of the OGs up to OG 2018. Prep companies can only take our best guesses at the difficulty levels, based on the performances of our students. Manhattan Prep has a tool called Navigator that allows students to record their answers to every OG ...” December 7, 2018 Brent@GMATPrepNow posted a reply to Circle question help in the Problem Solving forum “We''ll begin by arbitrarily placing point A somewhere on the circumference. https://i.imgur.com/hRHtq4o.png So, we want to know the probability that a randomly-placed point B will yield a chord AB that is at least 2 cm long. So, let''s first find a location for point B that creates a chord ...” December 7, 2018 Brent@GMATPrepNow posted a reply to Let C be defined as the sum of all prime numbers between in the Problem Solving forum “C = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 = 129 So, C/3 = 129/3 = 43 Answer: E Cheers, Brent” December 7, 2018 Brent@GMATPrepNow posted a reply to 2k years ago Frank was 3k years old. In k years Frank's age, in the Problem Solving forum “These kinds of questions (Variables in the Answer Choices - VIACs) can be answered algebraically or using the input-output approach. Mitch has solved the question using the input-output approach, so let''s use the algebraic approach. 2k years ago Frank was 3k years old. We''re given Frank''s ...” December 7, 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 Rich.C@EMPOWERgmat.com posted a reply to During a special promotion, a certain filling station is off in the Problem Solving forum “Hi All, We''re told that during a special promotion, a certain filling station is offering a 10 percent discount on gas purchased AFTER the first 10 gallons. Kim purchased 20 gallons of gas, and Isabella purchased 25 gallons of gas. We''re asked for Isabella''s total PER-GALLON DISCOUNT as a ...” December 7, 2018 Brent@GMATPrepNow posted a reply to In a 200 member association consisting of men and women, exa in the Problem Solving forum “In order to minimize the number of homeowners, we must MAXIMIZE the number of men in the group, since the proportion of male homeowners (20%) is less than the proportion of female homeowners (25%) So, let''s see what happens if there are 199 men and 1 woman. If 20% (aka 1/5) of the men are ...” December 6, 2018 Brent@GMATPrepNow posted a reply to If all of the telephone extensions in a certain company must in the Problem Solving forum “NOTE: Always SCAN the answer choices before performing any calculations. Here, we notice that the answer choices are pretty small, so if we don''t come up a full solution, we should consider LISTING AND COUNTING We get the following extensions: 1236 1326 1362 1632 2136 2316 3126 3162 ...” December 6, 2018 Brent@GMATPrepNow posted a reply to If all of the telephone extensions in a certain company must in the Problem Solving forum “Take the task of arranging the 4 digits and break it into stages. We’ll begin with the most restrictive stage. Stage 1: Select the digit in the units position Since the 4-digit extension must be EVEN, the unit digit must be either 2 or 6 So, we can complete stage 1 in 2 ways Stage ...” December 6, 2018 Brent@GMATPrepNow posted a reply to What was the revenue that a theater received from the sale in the Data Sufficiency forum “Target question: What was the revenue that a theater received from the sale of 400 tickets Jump straight to . . . Statements 1 and 2 combined The combined statements tell us that 100 tickets sold for the full price of$25 each. The remaining 300 tickets were sold at some reduced price. ...”
December 6, 2018
Brent@GMATPrepNow posted a reply to A certain high school offers two foreign languages, Spanish in the Problem Solving forum
“Another approach is to use the Double Matrix Method. This technique can be used for most questions featuring a population in which each member has two characteristics associated with it (aka overlapping sets questions). Here, we have a population of students, and the two characteristics are: - ...”
December 6, 2018
Brent@GMATPrepNow posted a reply to In year x, it rained on 40% of all Mondays and 20% of all in the Data Sufficiency forum
“In any given year, there will be 52 or 53 Mondays, 52 or 53 Tuesdays, etc. So, it''s impossible to say that it rained on 40% of all Mondays or 20% of all Tuesdays, etc. For example, if there are 52 Mondays, then 40% of 52 = 20.8, which means that it rained on 20.8 days (impossible). Cheers, ...”
December 6, 2018
Brent@GMATPrepNow posted a reply to Three men sit at a table. One dollar is placed in front of in the Problem Solving forum
“Let''s see what happens if a man waits until the last (5th) round to take the money. Round #1: $1 placed in front of the man (but he doesn''t take it) Round #2: Now,$2 placed in front of the man (but he doesn''t take it) Round #3: Now, $4 placed in front of the man (but he doesn''t take it) ...” December 5, 2018 Brent@GMATPrepNow posted a reply to If a, b, and c are positive integers such that a < b < in the Data Sufficiency forum “Target question: Is a% of b% of c an integer? This is a great candidate for rephrasing the target question. Aside: We have a free video with tips on rephrasing the target question: a% of b% of c is the same as (a/100)(b/100)(c), which equals abc/10,000 So, we can rephrase the target ...” December 5, 2018 Rich.C@EMPOWERgmat.com posted a reply to 190 students go to a school bake sale. 95 buy a chocolate in the Problem Solving forum “Hi All, We''re told that 190 students go to a school bake sale. Of those students, 95 buy a chocolate chip cookie, 75 buy a peanut butter cookie, and AT LEAST 12 buy both. We''re asked for the LEAST number of students who could have bought NEITHER type of cookie. This question is a variation on ...” December 5, 2018 Rich.C@EMPOWERgmat.com posted a reply to What is the difference between the number of three-member in the Problem Solving forum “Hi All, To start, I agree with Brent; the wording of this prompt is ''clunky'' - and the GMAT writers word their questions in a far more rigorous and specific fashion than what we see here. That having been said, the basic concepts involved here are Combinations and Permutations. We''re ...” December 5, 2018 Rich.C@EMPOWERgmat.com posted a reply to Mr. McCall selects a number that is two-digit and positive. in the Problem Solving forum “Hi All, We''re told that Mr. McCall selects a number that is two-digit and positive: If the number is prime, then he assigns that many problems for homework. If the number is NOT prime, then he assigns 8 MORE problems than the number for homework. We''re told he assigns 97 problems for homework. ...” December 5, 2018 Brent@GMATPrepNow posted a reply to If w, x, and y are consecutive odd positive integers and w & in the Problem Solving forum “Here''s a 3rd approach: GIVEN: w, x, and y are consecutive odd positive integers and w < x < y Since consecutive odd integers go up by 2, we can write: x = w + 2, and y = w + 2 + 2 = w + 4 So, y - x - w = (w + 4) - (w + 2) - w = w + 4 - w - 2 - w = 2 - w Since w is an ODD integer, ...” December 5, 2018 Brent@GMATPrepNow posted a reply to What is the difference between the number of three-member in the Problem Solving forum “The number of three-member committees that can be formed from a group of nine members Since the order in which we select the 3 people does not matter, we can use combinations. We can choose 3 people from 9 people in 9C3 ways 9C3 = (9)(8)(7)/(3)(2)(1) = 84 three-member committees The total ...” December 5, 2018 Brent@GMATPrepNow posted a reply to All the 7 books of the fictional character series Horry in the Problem Solving forum “At$8 per book, the 8 books SHOULD have cost $64 (8 x$8 = $64) However, Harry bought the 8 books for$60 So, the amount Harry saved = $64 -$60 = $4 What is savings percentage for Harry, who bought the whole set together? Percent savings = 100(amount saved)/(original price) = 100(4)/64 = ...” December 5, 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 Rich.C@EMPOWERgmat.com posted a reply to If s and t are two different numbers on the number line, is in the Data Sufficiency forum “Hi All, We''re told that S and T are two DIFFERENT numbers on the number line. We''re asked if S + T = 0. This is a YES/NO question and can be solved by TESTing VALUES and a bit of Number Property logic. 1) The distance between S and 0 is the SAME as the distance between T and 0 Since S ...” December 4, 2018 Rich.C@EMPOWERgmat.com posted a reply to In a certain company, 25% of the women and 17% of the men in the Data Sufficiency forum “Hi All, This question involves some subtle Number Property rules that you have to consider to get the correct answer. Those rules, along with TESTing VALUES, can help you to quickly answer the question... We''re told that 25% of the women and 17% of the men participate in the voluntary equity ...” December 4, 2018 Rich.C@EMPOWERgmat.com posted a reply to In her position as a real estate agent, Sarah receives a bon in the Problem Solving forum “Hi All, We''re told that Sarah receives a bonus for EACH sale she makes - and that last week, she earned a$4,000 bonus, which decreased her AVERAGE bonus amount to $4800 (which represents a decrease of 4%). We''re asked for the number of sales Sarah made. This question can be solved in a couple ...” December 4, 2018 Brent@GMATPrepNow posted a reply to Charlie takes 2.5 hours to fly from Los Angeles to Mexico Ci in the Problem Solving forum “Average speed = (total distance traveled)/(total travel time) So, Average speed = 1200/2.5 = 2400/5 = 4800/10 = 480 mph Answer: D Cheers, Brent” December 4, 2018 Brent@GMATPrepNow posted a reply to In her position as a real estate agent, Sarah receives a bon in the Problem Solving forum “Last week, Sarah earned a$4,000 bonus, which decreased her average bonus amount to $4800. This represents a decrease of 4%. Let x = OLD average bonus amount We can write: x - 0.04x =$4800 Simplify: 0.96x = $4800 Solve: x =$4800/(0.96) = $5000 How many sales has Sarah made? Let n = the ...” December 4, 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 Rich.C@EMPOWERgmat.com posted a reply to If x^3 < x^2, what is the value of the integer x? in the Data Sufficiency forum “Hi All, We''re told that X is an INTEGER and X^3 is LESS than X^2. We''re asked for the value of X. This question can be solved with a mix of Number Properties and TESTing VALUES. To start, there are only certain types of values that will fit the given information that X^3 is less than X^2: ...” December 3, 2018 Rich.C@EMPOWERgmat.com posted a reply to A certain company that sells only cars and trucks reported in the Problem Solving forum “Hi All, We''re told that a certain company that sells only cars and trucks reported that revenues from car sales in 1997 were down 11 percent from 1996 and revenues from truck sales in 1997 were up 7 percent from 1996. If total revenues from car sales and trucks sales in 1997 were up 1 percent ...” December 3, 2018 Rich.C@EMPOWERgmat.com posted a reply to Mary is building a pyramid out of stacked rows of soup cans. in the Problem Solving forum “Hi All, We''re told that Mary is building a pyramid out of stacked rows of soup cans; the top row of the pyramid contains a single soup can, each row below the top row contains 6 MORE cans than the one above it and the completed pyramid contains 16 rows. We''re asked for the TOTAL number of soup ...” December 3, 2018 Brent@GMATPrepNow posted a reply to If there are 4 pairs of twins, and a committee will be in the Problem Solving forum “Here''s another approach. Take the task of selecting the 3 committee members and break it into stages. Stage 1: Select the 3 twins from which we will select 1 spouse each. There are 4 sets of twins, and we must select 3 of them. Since the order in which we select the 3 twins does not ...” December 3, 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 ceilidh.erickson posted a reply to Most of Western music since the Renaissance has been based in the Critical Reasoning forum “For more on using this strategy for BOLDFACE questions on CR, see: https://www.beatthegmat.com/gmat-official-guide-2019-in-countries-where-automobile-t303686.html#818265 https://www.beatthegmat.com/gmat-official-guide-2019-boreal-owls-range-over-a-much-t303663.html#818059 ...” December 2, 2018 ceilidh.erickson posted a reply to Most of Western music since the Renaissance has been based in the Critical Reasoning forum “The goal in any BOLDFACE question is to deconstruct the argument, and determine the role of each statement: - author''s conclusion / position - support for the author - the counterpoint / what others believe - support for the counterpoint - neutral / background information / establishing ...” December 2, 2018 ceilidh.erickson posted a reply to 3 Month Study Plan? in the GMAT Strategy forum “You have more than enough material to study! Here''s what you need to do: Here''s what you should do: 1. Take an adaptive Practice Exam (CAT). If you bought the Mprep books, you''ll have access to our entire suite of practice exams. Don''t prep first - just dive in and take the test, ...” December 2, 2018 ceilidh.erickson posted a reply to Help me Beat the GMAT in the I just Beat The GMAT! forum “You can''t find what went wrong? You just told us what went wrong - you over-studied! Being well-rested is absolutely critical for brain functioning (see the studies that say that being sleep-deprived made people perform worse on driving tests than being drunk). There''s nothing that you could ...” December 2, 2018 ceilidh.erickson posted a reply to A certain bookstore, each notepad costs x dollars and each in the Data Sufficiency forum “Translate the given information:$10 is enough to buy 5 notepads and 3 markers --> $$5x+3y\le10$$ Translate the question: is $10 enough to buy 4 notepads and 4 markers instead? --> $$4x+4y\le10\ ?$$ Simplify: $$2x+2y\le5\ ?$$ 1) Each notepad cost less than$1. If x < 1, ...”
December 2, 2018
ceilidh.erickson posted a reply to Several friends in a dinner group decide to contribute in the Data Sufficiency forum
“For similar variations on this type of word problem, see: https://www.beatthegmat.com/impossible-question-ps-203-t281881.html#739205 https://www.beatthegmat.com/dollars-t273184.html#707179 ...”
December 2, 2018
ceilidh.erickson posted a reply to Several friends in a dinner group decide to contribute in the Data Sufficiency forum
“Here, we have a version of a rate problem: ($contribution per person)(# of people) = total$ amount contributed From the question stem, we''re given that the total amount contributed is $36. Let: c =$ contribution per person n = number of people (c)(n) = 36 Since the question is asking ...”
December 1, 2018
ceilidh.erickson posted a reply to the minimum number of straight lines required to in the GMAT Math forum
“This is not a GMAT-style question. The GMAT does not ask for this style of time-consuming puzzle problem. Please still to questions only from GMAC or reputable test prep companies.”
December 1, 2018
Rich.C@EMPOWERgmat.com posted a reply to When running a mile during a recent track meet, Nuria was in the Problem Solving forum
“Hi All, We''re told that when running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a MINUTE ...”
December 1, 2018
Rich.C@EMPOWERgmat.com posted a reply to When a certain tree was first planted, it was 4 feet tall in the Problem Solving forum
“Hi All, TESTing the ANSWERS is a great way to tackle this question. The "fast" way to solve a problem can still sometimes take time, but regardless of how you approach a prompt, you still need to take notes and stay organized. From the screen capture, you chose answer C (1/2). If ...”
December 1, 2018
Rich.C@EMPOWERgmat.com posted a reply to Portia purchased a laptop for $480, but after checking the in the Problem Solving forum “Hi All, We''re told that Portia purchased a laptop for$480, but after checking the merchant''s website realized that she had been overcharged by 20%. We''re asked how many dollars she was overcharged. This question can be solved in a couple of different ways, including by TESTing THE ANSWERS. ...”
December 1, 2018
Brent@GMATPrepNow posted a reply to For each of her sales, a saleswoman receives a commission in the Problem Solving forum
“Saleswoman receives a commission equal to 20 percent of the first $500 of the total amount of the sale, plus 30 percent of the total amount in excess of$500 If she sold $800, then... Commission = (20 percent of$500) + (30 percent of $300) =$100 + $90 =$190 The saleswoman''s commission ...”
December 1, 2018
Brent@GMATPrepNow posted a reply to Portia purchased a laptop for $480, but after checking the in the Problem Solving forum “Let x = the INTENDED price of the laptop Portia was overcharged by 20% So, x + (20% of x) = the amount Portia paid In other words: x + 0.2x =$480 Simplify: 1.2x = 480 Solve: x = 480/1.2 = 400 So, Portia was SUPPOSED to pay $400, but she actually paid$480 So, Portia was overcharged ...”
December 1, 2018
Brent@GMATPrepNow posted a reply to When a certain tree was first planted, it was 4 feet tall in the Problem Solving forum
“Height of tree on day 0 = 4 Let d = the height increase each year Height of tree at the end of the 1st year = 4+d Height of tree at the end of the 2nd year = 4+d+d = 4 + 2d Height of tree at the end of the 3rd year = 4+d+d+d = 4 + 3d Height of tree at the end of the 4th year = 4+d+d+d+d = 4 + ...”
December 1, 2018
Rich.C@EMPOWERgmat.com posted a reply to Reggie purchased a car costing $8,700. As a down payment he in the Problem Solving forum “Hi All, We''re told that Reggie purchased a car costing$8,700 and as a down payment he used a $2,300 insurance settlement and an amount from his savings equal to 15 percent of the difference between the cost of the car and the insurance settlement. He borrowed the rest of the money needed to ...” November 30, 2018 Rich.C@EMPOWERgmat.com posted a reply to Of the employees at a company, 60 percent were men and, of in the Problem Solving forum “Hi swerve, We''re told that of the employees at a company, 60 percent were men and, of these, 1/10 were still employed after a recent corporate restructuring and the number of women who were still employed after the restructuring was FIVE TIMES the number of men who were employed after it. ...” November 30, 2018 Brent@GMATPrepNow posted a reply to Last Friday a certain shop sold 3/4 of the sweaters in its in the Data Sufficiency forum “ Given: Last Friday a certain shop sold 3/4 of the sweaters in its inventory. Each sweater sold for$20. Target question: What was the total revenue last Friday from the sale of this sweaters? Statement 1: When the shop opened last Friday, there were 160 sweaters in its inventory. 3/4 ...”
November 30, 2018
Brent@GMATPrepNow posted a reply to When running a mile during a recent track meet, Nuria was in the Problem Solving forum
“The long approach is to meticulously convert 11/25 of a minute to seconds, and then ADD that unaccounted time to Nuria''s recorded time (of 5 minutes, 44 seconds) However, when we check the answer choices before performing any calculations (ALWAYS check the answer choices before performing any ...”
November 30, 2018
Rich.C@EMPOWERgmat.com posted a reply to A box contains red and blue balls only. If there are 8 balls in the Data Sufficiency forum
“Hi All, We''re told that a box contains red and blue balls only and that there are 8 balls in total. We''re asked for the number of RED balls are in the box. 1) If two balls are randomly selected without replacement, the probability that both balls are red is 5/14 To start, since we''re ...”
November 29, 2018
Rich.C@EMPOWERgmat.com posted a reply to Inequality in the Data Sufficiency forum
“Hi All, We''re asked for the value of |X - 2|. This question comes down to a specific math concept (Absolute Value), some basic arithmetic and thoroughness on your part - meaning that you have to make sure that you answer the question that is ASKED. 1) |X - 4| = 2 Since we''re dealing ...”
November 29, 2018
Rich.C@EMPOWERgmat.com posted a reply to 3 Month Study Plan? in the GMAT Strategy forum
“Hi intelligenthuman171, Since it sounds like you''re just beginning your studies, then it would be a good idea to take a FULL-LENGTH practice CAT Test; you can take 2 for free at www.mba.com (and they come with some additional practice materials). If you want to do a little studying first, so ...”
November 29, 2018
Brent@GMATPrepNow posted a reply to GMAT PREP CR... why is A wrong? in the Critical Reasoning forum
“A student asked me to answer this question, so here it goes . . . 1) Read the question stem to determine the question type. Tricky! With fill-in-the-blank questions, it''s often difficult to determine the question type. The last sentence reads Unitron is not going to hire department heads ...”
November 29, 2018
Brent@GMATPrepNow posted a reply to New cars leave a car factory in a repeating pattern of red, in the Problem Solving forum
“Let''s examine the pattern. CAR # | color 1 | red 2 | blue 3 | black 4 | gray 5 | red 6 | blue 7 | black 8 | gray 9 | red . . . The pattern REPEATS EVERY 4 CARS. So, we say the pattern has CYCLE 4 Also, notice that every car # that''s divisible by 4 is gray So, let''s find a ...”
November 29, 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
Rich.C@EMPOWERgmat.com posted a reply to If each of the two digits X and Y is distinct, is the two di in the Data Sufficiency forum
“Hi All, We''re told that each of the two DIGITS X and Y is distinct. We''re asked if the two-digit integer XY is PRIME. This is a YES/NO question and can be solved by TESTing VALUES. 1) Each of the digits X and Y is the sum of 2 distinct single digit prime numbers. The single-digit ...”
November 29, 2018
Brent@GMATPrepNow posted a reply to If each of the two digits X and Y is distinct, is the two di in the Data Sufficiency forum
“Target question: Is the two-digit integer xy prime? Given: Each of the two digits x and y is distinct Statement 1: Each of the digits x and y is the sum of 2 distinct single digit prime numbers. Let''s TEST some values. There are several values of x and y that satisfy statement 1. Here ...”
November 29, 2018
Brent@GMATPrepNow posted a reply to Joan spent $10 to buy at least one piece each of apples and in the Data Sufficiency forum “Target question: How many apples did Joan buy? Given: Joan spent$10 to buy at least one piece each of apples and oranges at a store where each apple cost $2 and each orange cost$1. Since there are only a handful of possible outcomes, we might benefit from quickly listing them: i) Joan ...”
November 29, 2018
Rich.C@EMPOWERgmat.com posted a reply to A casino pays players with chips that are either turquoise in the Data Sufficiency forum
“Hi All, We''re told that a casino pays players with chips that are either turquoise- or violet- colored; each turquoise- colored chip is worth T dollars, and each violet- colored chip is worth V dollars, where T and V are INTEGERS. We''re asked for the combined value of four turquoise- colored ...”
November 29, 2018
Rich.C@EMPOWERgmat.com posted a reply to On a partly cloudy day, Derek decides to walk back from work in the Problem Solving forum
“Hi All, This question can be solved by TESTing THE ANSWERS. To start, the prompt provides a few clues about why the speeds have to be 2 miles/hour and 3 miles/hour: 1) The two speeds are S miles/hour and (S+1) miles/hour, so the two numbers must differ by EXACTLY 1. 2) We''re told that S ...”
November 29, 2018
Rich.C@EMPOWERgmat.com posted a reply to 12 year out of college, GMAT study plans? in the GMAT Strategy forum
“Hi KDR83, Your Essay and IR Scores are both nice achievements - but most Programs do much put much of a ''premium'' on either of those Scores (although depending on the number of applicants and the situation, it''s possible that those Scores could serve as ''tie breakers'' in your favor). I''d ...”
November 28, 2018
Brent@GMATPrepNow posted a reply to If 320 people attended the wedding and 200 attendees drank in the Data Sufficiency forum
“This question is somewhat ambiguous, since it''s hard to say whether "nondrinkers" in statement 1 refers to people who drank neither beer nor wine, or did not drink beer. I''m assuming that it means to not drink beer, so I''ve add that to the question below. One approach is to use ...”
November 28, 2018
Brent@GMATPrepNow posted a reply to Difficult Manhatan Problem in the Problem Solving forum
“Target question: What is the hundreds digit of the product AB? Given: The difference between positive two-digit integer A and the smaller two-digit integer B is twice A‘s units digit Let x = the tens digit of A, and let y = the units digit of A So, the VALUE of A = 10x + y From the ...”
November 28, 2018
Brent@GMATPrepNow posted a reply to If a child is randomly selected from Columbus Elementary in the Data Sufficiency forum
“Target question: What is the probability that the child will be a boy? This is a good candidate for rephrasing the target question. Let G = # of girls in the school Let B = # of boys in the school So, G + B = total number of children in the school So, P(selected child is a boy) = B/(G + B) ...”
November 28, 2018
Brent@GMATPrepNow posted a reply to A club has 10 members. One president and two vice-presidents in the Problem Solving forum
“Take the task of selecting the president and two vice-presidents and break it into stages. Stage 1: Select the president There are 10 people to choose from. So, we can complete stage 1 in 10 ways Stage 2: Select two people to be the vice-presidents Since the order in which we select the ...”
November 28, 2018
Brent@GMATPrepNow posted a reply to On a partly cloudy day, Derek decides to walk back from work in the Problem Solving forum
“Let''s PLUG IN a nice value for the total distance traveled. If Derek''s average speed is 2.8 mph, then let''s say that he traveled a total of 28 miles. At an average rate of 2.8 mph, a 28 mile trip will take 10 hours. Since Derek''s average speed is BETWEEN 2 and 3 mph, we can conclude that ...”
November 28, 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
Rich.C@EMPOWERgmat.com posted a reply to A company accountant estimates that airfares next year for in the Problem Solving forum
“Hi All, We''re told that a company accountant estimates that airfares next year for business trips of a thousand miles or less will increase by 20 percent and airfares for all other business trips will increase by 10 percent. This year, total airfares for business trips of a thousand miles or ...”
November 28, 2018
Rich.C@EMPOWERgmat.com posted a reply to An urn contains 10 balls, numbered from 1 to 10. If 2 balls in the Problem Solving forum
“Hi All, We''re told that an urn contains 10 balls, numbered from 1 to 10 and we''re told that 2 balls are selected at random WITH replacement. We''re asked for the probability that the SUM of the 2 numbers on the balls will be EVEN. This question can be solved in a couple of different ways, ...”
November 28, 2018
Rich.C@EMPOWERgmat.com posted a reply to In a group of 20 people, 5 of them belong to the golf club, in the Problem Solving forum
“Hi All, 3-Group Overlapping Sets questions are relatively rare on the Official GMAT (you likely will NOT see this version of Overlapping Sets on Test Day). However, there is a formula that you can use to solve it. Total = (Those in none of the groups) + (1st group) + (2nd group) + (3rd ...”
November 27, 2018
Rich.C@EMPOWERgmat.com posted a reply to Between the first day of May and last day in June, the price in the Problem Solving forum
“Hi All, We''re told that a between the first day of May and last day in June, the price per kilogram of Melange, a seasoning mix, first DECLINED by 20 percent and then INCREASED by 50 percent and during this same period, the price per liter of Blue, a spring water, first INCREASED by 20 percent ...”
November 27, 2018
Rich.C@EMPOWERgmat.com posted a reply to Bobby bought 2 shares, and which he sold for $96 each. If he in the Problem Solving forum “Hi All, We''re told that Bobby bought 2 shares, which he sold for$96 each, he had a profit of 20% on the sale of one of the shares but a loss of 20% on the sale of the other share. We''re asked to find the TOTAL profit or loss on the sale of the two shares. This question essentially comes down ...”
November 27, 2018
Rich.C@EMPOWERgmat.com posted a reply to GMAT Experience: 540 to 640 in one month in the I just Beat The GMAT! forum
“Hi utdallas2019, That''s absolutely fantastic news! A 100-point improvement in such a short period of time is a terrific achievement - and since this 640 puts you well above your Goal Score, this sounds like a bit ''win'' overall! You clearly have a strong work ethic and capacity to improve, so I ...”
November 27, 2018
Brent@GMATPrepNow posted a reply to The weights of four packages are 1, 3, 5, and 7 pounds, resp in the Problem Solving forum
“That''s MUCH better than my solution!! Cheers, Brent<i class="em em---1"></i>”
November 27, 2018
Brent@GMATPrepNow posted a reply to The weights of four packages are 1, 3, 5, and 7 pounds, resp in the Problem Solving forum
“For each answer choice, if we CAN create the total given weight, then we can ELIMINATE that answer choice. a) 9 = 1 + 3 + 5 ELIMINATE b) 10 = 3 + 7 ELIMINATE c) 12 = 5 + 7 ELIMINATE d) 13 = 1 + 5 + 7 ELIMINATE By the process of elimination, the correct answer is E Cheers, Brent”
November 27, 2018
Brent@GMATPrepNow posted a reply to If 1+2+2^2+... +2^n=2^{n+1}-1, what is the largest prime fac in the Problem Solving forum
“GIVEN: 1 + 2 + 2^2 + ... + 2^n = 2^{n+1} - 1 So, 1 + 2 + 2^2 + ... + 2^7 = 2^{7+1} - 1 = 2^8 - 1 If we recognize that the above expression is a difference of squares, we can factor it to get.... 2^8 - 1 = (2^4 + 1)(2^4 - 1) = (2^4 + 1)(2^2 + 1)(2^2 - 1) = (16 + 1)(4 + 1)(4 - 1) = ...”
November 27, 2018
Brent@GMATPrepNow posted a reply to How many integers from 0 to 50, inclusive, have a remainder in the Problem Solving forum
“When it comes to remainders, we have a nice rule that says: If N divided by D leaves remainder R, then the possible values of N are R, R+D, R+2D, R+3D,. . . etc. For example, if k divided by 5 leaves a remainder of 1, then the possible values of k are: 1, 1+5, 1+(2)(5), 1+(3)(5), ...”
November 27, 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
Rich.C@EMPOWERgmat.com posted a reply to In a certain state, gasoline stations compute the price per in the Problem Solving forum
“Hi All, This question can be solved by TESTing VALUES. P = Price per gallon CHARGED D = Price per gallon for the Dealer We''re told that the Dealer price has a 4% tax AND 18 cents per gallon added on. So, I''m going to pick a nice round number for D. D = $10 P =$10 +4%($10) + ...” November 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to At an auto detailing company, it takes 15 minutes for an in the Problem Solving forum “Hi All, We''re told that at an auto detailing company, it takes 15 minutes for an employee to service a car and 24 minutes to service a truck and the company needs to service all 300 trucks and 360 cars on a lot during a 6-hour shift. We''re asked for the number of employees needed to complete ...” November 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to A certain recipe calls for 2 cups of sugar and 3 1/2 cups of in the Problem Solving forum “Hi All, We''re told that a certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour. We''re asked for the ratio of sugar to flour in this recipe. This question can be solved in a couple of different ways. The answer choices are sufficiently ''spread out'' that we can actually answer this ...” November 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to A chili recipe calls for the final mixture to consist of 1/2 in the Problem Solving forum “Hi vinni.k, We''re told that a chili recipe calls for the final mixture to consist of 1/2 meat and 1/3 beans, with the remainder an even mixture of sauce and various spices (and a total of 6 pounds of sauce and spices are used). We''re asked how many pounds of beans are used. This question can ...” November 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to GMAT Mistake Tracker Tool from EMPOWERgmat in the GMAT Strategy forum “Hi nnennaj, We''ve been unable to recreate the error that you are experiencing. One of our Engineers suggested that you might try using Apple Numbers. GMAT assassins aren''t born, they''re made, Rich” November 27, 2018 Rich.C@EMPOWERgmat.com posted a reply to GMAT Error Logs Suggestions and Feedback in the Suggestions and Feedback forum “Hi nnennaj, We''ve been unable to recreate the error that you are experiencing. One of our Engineers suggested that you might try using Apple Numbers. GMAT assassins aren''t born, they''re made, Rich” November 27, 2018 Brent@GMATPrepNow posted a reply to Is b even? in the Data Sufficiency forum “Target question: Is b even? KEY POINT: We are not told that a and b are INTEGERS. As such, we can jump straight to. . . . Statements 1 and 2 combined There are several values of a and b that satisfy BOTH statements. Here are two: Case a: a = 4 and b = 2. Notice that a/b = 4/2 = 2, ...” November 27, 2018 Brent@GMATPrepNow posted a reply to In the rectangular coordinate system shown above, does the in the Data Sufficiency forum “Target question: Does line k intersect quadrant II? Statement 1: The slope of k is -1/6 Here are a few lines with slope -1/6 https://i.imgur.com/1p6USLh.png KEY CONCEPT: As we travel from right to left along a line with slope -1/6, we keep moving up. So, at some point, the line will ...” November 27, 2018 Brent@GMATPrepNow posted a reply to A certain recipe calls for 2 cups of sugar and 3 1/2 cups of in the Problem Solving forum “Judging from the OA, I''ve added some key text below A certain recipe calls for 2 cups of sugar and 3 1/2 cups of flour So sugar/flour = 2/3.5 Check answer choices . . . . not there. Looks like we need to create a ratio that''s EQUIVALENT to 2/3.5 Multiply top and bottom by 2 to get ...” November 27, 2018 Brent@GMATPrepNow posted a reply to When the positive integer x is divided by 6, the remainder in the Problem Solving forum “Good catch - thanks Fabio! I''ve edited my response accordingly. Cheers, Brent” November 26, 2018 Brent@GMATPrepNow posted a reply to In a certain state, gasoline stations compute the price per in the Problem Solving forum “In a certain state, gasoline stations compute the price per gallon "p", in dollars, charged at the pump by adding a 4 percent sales tax to the dealer''s price per gallon "d", in dollars . . . We can write: p = d + 4% of d = d + 0.04d = 1.04d So, we have: p = 1.04d . . . ...” November 26, 2018 Brent@GMATPrepNow posted a reply to When the positive integer x is divided by 6, the remainder in the Problem Solving forum “APPROACH#2 When the positive integer x is divided by 6, the remainder is 4 In other words, x is 4 greater than some multiple of 6 We can write: x = 6k + 4, where k is an integer If x = 6k + 4, we can also write: x = 6k + 3 + 1 Factor to get: x = 3(2k + 1) + 1 Since 2k+1 must be an integer, ...” November 26, 2018 Brent@GMATPrepNow posted a reply to When the positive integer x is divided by 6, the remainder in the Problem Solving forum “----ASIDE------------------- When it comes to remainders, we have a nice rule that says: If N divided by D leaves remainder R, then the possible values of N are R, R+D, R+2D, R+3D,. . . etc. For example, if k divided by 5 leaves a remainder of 1, then the possible values of k are: 1, ...” November 26, 2018 Brent@GMATPrepNow posted a reply to A chili recipe calls for the final mixture to consist of 1/2 in the Problem Solving forum “A chili recipe calls for the final mixture to consist of 1/2 meat and 1/3 beans, with the remainder an even mixture of sauce and various spices Let''s see what fraction of the final mixture is sauce and various spices 1/2 + 1/3 = 3/6 + 2/6 = 5/6 If 5/6 of the mixture is meat and beans, then the ...” November 26, 2018 Brent@GMATPrepNow posted a reply to A store sells only two types of shirts, branded and in the Data Sufficiency forum “ Given: All the branded shirts are priced at$60 per unit and all the non-branded shirts are priced at $20 per unit. On a certain day, the store sold a total of 30 shirts. Let B = # of branded shirts sold Let N = # of non-branded shirts sold If a TOTAL of 30 shirts were sold, we can write: N + ...” November 26, 2018 Brent@GMATPrepNow posted a reply to Of the 4,800 voters who voted for or against Resolution K, in the Data Sufficiency forum “Target question: What was the total number of female voters who voted for Resolution K? When solving Data Sufficiency questions, it''s important that you don''t perform more calculations than are necessary. So, for this question, we need only determine whether or not we have sufficient ...” November 26, 2018 Brent@GMATPrepNow posted a reply to If x and y are nonnegative integers, what is the value of y? in the Data Sufficiency forum “The above solutions are great. I just wanted to add that whenever you''re told that a value is non-negative on the GMAT, you should be sure to consider what happens when that value equals zero Keep in mind that, if the test-makers wanted to restrict a value to POSITIVE values only, then they''d ...” November 25, 2018 Brent@GMATPrepNow posted a reply to If n is the smallest integer such that 432 times n is the in the Problem Solving forum “IMPORTANT CONCEPT: The prime factorization of a perfect square (the square of an integer) will have an even number of each prime For example: 400 is a perfect square. 400 = 2x2x2x2x5x5. Here, we have four 2''s and two 5''s This should make sense, because the even numbers allow us to split the ...” November 25, 2018 Brent@GMATPrepNow posted a reply to Set P {a, b, c, d, e, f, g} Set Q {a, b, c, d, e, f} If a, b in the Problem Solving forum “The key here is MUST be true. So, if we can find an example in which a statement is NOT true, then we can ELIMINATE it. We have: Set P {a, b, c, d, e, f, g} Set Q {a, b, c, d, e, f} I''ll make the extra value red so it''s easier to compare the two sets So, the sets COULD be: Set P {1, 2, ...” November 25, 2018 Brent@GMATPrepNow posted a reply to Every object in a box is either a sphere or a cube, and ever in the Data Sufficiency forum “Target question: How many objects are in the box? Given: Every object in a box is either a sphere or a cube, and every object in the box is either red or green. We can solve this using the Double Matrix Method. This technique can be used for most questions featuring a population in which ...” November 25, 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 Brent@GMATPrepNow posted a reply to Last month, a florist gave 7 percent of her sales revenue to in the Problem Solving forum “Choose a "nice" number for the sales revenue Let$100 = LAST MONTH''s revenue So, $120 = THIS MONTH''s revenue (since sales were up 20 percent from last month) LAST month, a florist gave 7 percent of her sales revenue to her employees in bonuses So, bonuses = 7% of$100 = $7 ...” November 23, 2018 Brent@GMATPrepNow posted a reply to In a plane, there are two parallel lines. One line has 5 in the Problem Solving forum “There are two ways in which we can create a triangle. #1) Select 2 points from the 5-point line and select 1 point from the 4-point line. #2) Select 2 points from the 4-point line and select 1 point from the 5-point line. #1) Select 2 points from the 5-point line and select 1 point from the ...” November 23, 2018 Rich.C@EMPOWERgmat.com posted a reply to A retailer sells only radios and clocks. If she currently in the Problem Solving forum “Hi All, We''re told that a retailer sells only radios and clocks and she currently has 44 total items in inventory. We''re asked how many of those items are radios. This question can be solved by TESTing VALUES. 1) The retailer has MORE than 28 radios in inventory. With 44 total items, ...” November 23, 2018 Rich.C@EMPOWERgmat.com posted a reply to A certain telephone company offers two plans, A and B. Under in the Problem Solving forum “Hi All, We''re told that a certain telephone company offers two plans, A and B. Under plan A, the company charges a total of$0.60 for the FIRST 7 minutes of each call and $0.06 per minute thereafter. Under plan B, the company charges$0.08 per minute of each call. We''re asked for the duration ...”
November 23, 2018
Rich.C@EMPOWERgmat.com posted a reply to R and S can complete a certain job in 6 and 4 days respectiv in the Problem Solving forum
“Hi All, We''re told that R and S can complete a certain job in 6 and 4 days respectively, while they work individually. We''re asked for the LEAST number of days they will take to complete the same job, if they work on alternate days. Although the wording of this question is a bit ''clunky'', ...”
November 23, 2018
Rich.C@EMPOWERgmat.com posted a reply to Twelve identical machines, running continuously at the same in the Problem Solving forum
“Hi All, We''re told that twelve identical machines, running continuously at the same constant rate, take 8 days to complete a shipment. We''re asked how many ADDITIONAL machines, each running at the same constant rate, would be needed to REDUCE the time required to complete a shipment BY two ...”
November 23, 2018
Brent@GMATPrepNow posted a reply to GMAT PREP KAPLAN VIDEO in the The 60-Day GMAT Study Guide forum
“Thanks for the heads up. This video should serve as a replacement: https://www.gmatprepnow.com/module/general-gmat-strategies/video/1250 Cheers, Brent”
November 23, 2018
Brent@GMATPrepNow posted a reply to Alan and Peter are cycling at different constant rates on a in the Data Sufficiency forum
“ Given: Alan is NOW 3 miles ahead of Peter Target question: How many minutes from now will Peter be 1 mile ahead of Alan? Statement 1: ONE HOUR AGO, Alan was 7 miles ahead of Peter. Alan is NOW 3 miles ahead of Peter So, in one hour, the GAP between Alan and Peter decreased by 4 miles ...”
November 23, 2018
Brent@GMATPrepNow posted a reply to List M consists of 50 decimals, each of which has a value be in the Problem Solving forum
“Let''s examine the EXTREME CASES S - T = x percent of T So, S - T = (x/100)T Divide both sides by to get: (S - T)/T = x/100 Multiply both sides by 100 to get: x = 100(S - T)/T First, we we''ll MINIMIZE the value of x by minimizing the value of S - T and maximizing the value of T. This ...”
November 23, 2018
Brent@GMATPrepNow posted a reply to R and S can complete a certain job in 6 and 4 days respectiv in the Problem Solving forum
“Let''s assign a "nice" value to the job, a value that works well with the given values (6 days and 4 days ). So, let''s say the ENTIRE job is to make 24 widgets R can complete a certain job in 6 days In other words, R can make 24 widgets in 6 days So, R can make 4 widgets per day ...”
November 23, 2018
Brent@GMATPrepNow posted a reply to A certain telephone company offers two plans, A and B. Under in the Problem Solving forum
“Let x = the duration of the phone call (in minutes) Under plan A, the company charges a total of $0.60 for the first 7 minutes of each call and$0.06 per minute thereafter. So, the TOTAL cost = $0.60 + (x - 7 minutes)($0.06) = 0.60 + (0.06x - 0.42) = 0.06x + 0.18 Under plan B, the company ...”
November 23, 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
Rich.C@EMPOWERgmat.com posted a reply to Gmat Journey... 690 - 640 -710 in the I just Beat The GMAT! forum
“Hi gmat king, The other posts in this thread are over 5 years old, so you might not receive a response from any of the posters. If you''re looking to improve your GMAT Score, then I''ll be happy to analyze your situation/Scores. Before I can offer you the specific advice that you’re looking ...”
November 22, 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 Rich.C@EMPOWERgmat.com posted a reply to 30 Days to Improve My Score. Can it be done? in the GMAT Strategy forum “Hi clubber112358, To start, if you have taken any other practice CATs besides the two that you listed, then that information is important. If you''ve been scoring in the low-500s for some time, then it''s possible that you have gotten ''stuck'' at this particular score level - and your ''next ...” November 21, 2018 Rich.C@EMPOWERgmat.com posted a reply to Help me Beat the GMAT in the I just Beat The GMAT! forum “Hi melisaaslan, I''m sorry to hear that Test Day didn''t go as well as planned. When these types of score drops occur, the two likely "causes" involve either something that was unrealistic during practice or something that was surprising (or not accounted for) on Test Day. If you can ...” November 21, 2018 Brent@GMATPrepNow posted a reply to Bite-sized video lessons from GMAT Prep Now in the GMAT Math forum “The Something Method for solving certain equations Video: https://www.youtube.com/watch?v=mmTisgtNfTI Cheers, Brent” November 21, 2018 Brent@GMATPrepNow posted a reply to If m represents the slope of a line in the coordinate geomet in the Data Sufficiency forum “Target question: Does the line intersect quadrant III? Jump straight to... Statements 1 and 2 combined Here are two scenarios that satisfy BOTH statements: Case a: m = 3 https://i.imgur.com/2SVui9E.png In this case, the answer to the target question is YES, the line DOES intersect ...” November 21, 2018 Brent@GMATPrepNow posted a reply to In the first year of a pyramid scheme, John convinced y of in the Data Sufficiency forum “Target question: What was the value of y? Statement 1: The revenue for the website that year was$36,000. First round of "investors": y people paying $30 each = 30y dollars Second round of "investors": y² people paying$15 each = 15y² dollars Total revenue = 15y² + ...”
November 21, 2018
Brent@GMATPrepNow posted a reply to Missing day 20 in the The 60-Day GMAT Study Guide forum
“Done! Cheers, Brent”
November 21, 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