# tennisstar

cans posted a reply to explain in the Data Sufficiency forum
“Statement 1 is sufficient. as v+z =6, both v and z have to be 3. as each number occurs once in each row and once in each column, row2, row3, column2 and column 3 already have 3. thus in row 1, only column 1 can have 3 which is r. thus r=3.”
June 1, 2015
cans posted a reply to OG 108 in the Problem Solving forum
“How did you try to solve it? IMO D”
April 1, 2013
cans posted a reply to Exp. PS in the Problem Solving forum
“R = 3^81 R^R = (3^81)^(3^81) = 3^(81* (3*81))) = 3^(3^4* (3*81)))= 3^ (3^85) = 3^S S =3^85 IMO D”
May 21, 2012
cans posted a reply to Passive SC in the Sentence Correction forum
“IMO A”
October 16, 2011
cans posted a reply to Tough!!!!!! in the Problem Solving forum
“the first point can be located anywhere. Now lets call it A. Now from A, the maximum distance can be 2r and minimum can be 0. Also R distance means 120 degree at centre or 1/3 prob of choosing B. now if B is the extreme distant point, then 1/6 for C and if B is the nearest point, 1/3 for C ...”
October 16, 2011
cans posted a reply to *** Confused *** Is the product xy negative in the Data Sufficiency forum
“B) (x - 4)/(y - 3) = 1 -> x-y=1 your 3 scenarios are incorrect. y=-0.5 and x=1+y = 0.5 xy = -.25”
October 16, 2011
cans posted a reply to 750 (Q51, V40) (First and Last Attempt) :) in the I just Beat The GMAT! forum
“I m still going to be active in atleast quant forums... :)”
October 14, 2011
cans posted a new topic called 750 (Q51, V40) (First and Last Attempt) :) in the I just Beat The GMAT! forum
“I took the GMAT on 13th Oct, I guess one of my lucky days. Please don''t look for Sentence Correction Errors in this post. 750 (Q51 and V40) 750 was my dream score.. and even V40... I was always sure about Q51 though :) And about the tips and preparation, I am not the one to ask how to study ...”
October 14, 2011
cans posted a new topic called When is the next 100K chALLENGE? in the The $100K Challenge forum “When is the next 100K chALLENGE? Its been a long time there has been a challenge..” October 12, 2011 cans posted a reply to Aristotle SC-Usage of Being in the Sentence Correction forum “c,d,e: subject very agreement (presence of them,they) in A) the risk is to be eaten is awkward and not grammatical where as B) makes sense. Also "being" is usually wrong and not always wrong....” October 12, 2011 cans posted a reply to Aristotle SC- Meaning issue in the Sentence Correction forum “IMO C rare modifies kindness in E whereas it should modify show.......” October 12, 2011 cans posted a reply to SC GMATPrep help in the Sentence Correction forum “IMO c” October 12, 2011 cans posted a reply to GMATPREP:Bank Account problem in the Data Sufficiency forum “is r>8 ?? b) when r=8, we will have 1.08^2 = 1.1664. Thus insufficient. if r<8, we can have some value such that 1=r/100)^2 > 1.15 and < 1.16 a) we can find r.. sufficient” October 12, 2011 cans posted a reply to Tough MEAN, MEDIAN question...Please help me in the Data Sufficiency forum “Hey, I always try to simplify equation a bit with algebra and try to put numbers. Specially in cases such as mean and median... But if question is like a>b is given, find if b>c or not, I try to pick numbers.. Dunno if this is of much help but always go with your intuition :)” October 12, 2011 cans posted a reply to Swordsman-CR in the Critical Reasoning forum “Yeah I meant to say it can''t be B.. :)” October 12, 2011 cans posted a reply to INFERENCE Question 3 in CR in the Critical Reasoning forum “IMO E finding 2: most of the orders by people under 35. finding 1: 30% of subscribers under 35 placed order. as most of the orders by people less than 35, but subscribers under 35 contributed only 30% which can''t be considered most, it means many orders were places by people who are nt ...” October 12, 2011 cans posted a reply to SC Doubt in the Sentence Correction forum “remove one of the best universities in the US as that is a modifier. So sentence remains The three volumes of the author’s biography begin with his childhood in a small village and culminate with his years at Stanford University. in B) The three volumes of the author’s biography that begin ...” October 11, 2011 cans posted a reply to GMAT PREP:Good question on Inequalities in the Data Sufficiency forum “first one IMO A?” October 11, 2011 cans posted a reply to confusing CR in the Critical Reasoning forum “IMO B Ronald says that unless interest rates drop significantly, housing prices should not rise. Mark replies: He doesn''t agree because last time interest rates fell and prices didn''t increase. Thus he interprets Ronald is saying that if interest rates fall, housing prices will rise...” October 11, 2011 cans posted a reply to Mayor: Downtown Rosco Lake -CR in the Critical Reasoning forum “in your explanation you have assumed that volunteers didn''t went on Monday. This is an assumption that you are making and nothing is mentioned about this.” October 11, 2011 cans posted a reply to SC Question : Store in Santa Monica in the Sentence Correction forum “In question Bloomingadale is mentioned which is not present in any of the 2 options. Anyway as mentioned in the question, the store''s size is < 1/8th the size of chain''s Manhattan store. in B) the Manhattan flagship store can be of any other chain also. (say UCB).” October 11, 2011 cans posted a reply to Algebraic Solution needed in the Data Sufficiency forum “x>y?? B) x^3 >y x=2, y=3. b) satisfies but x<y and x=10,y=3 satisfies both condition. Insufficient A) root(x) > y if x=1/4, sqrt(x)=1/2. if y>1/4 and y<1/2, only one condition will satisfy. Thus insufficient A&B) x <0 is not possible as sqrt (x)>0 is given. if ...” October 11, 2011 cans posted a reply to Absolute values! in the Data Sufficiency forum “B) |3-y|=11 |y-3|=11 if y>=3,y=14 if y<=3, y=-8. 2 solutions. insufficient A) 3|x^2-4|=y-2 x value is not known. thus insufficient. A&B) if y=-8, 3* |x^2 - 4| = -10 <0 not possible. Thus y=14 sufficient IMO C” October 11, 2011 cans posted a reply to Triangle and semi-circles in the Problem Solving forum “we know p^2 + b^2 = h^2 in a right angles triangle. Thus let the side of A1 be p, A2 be b and A3=h. a1 = pi * (p/2)^2 * 1/2 (=pi*r^2 / 2) = pi/8 * p^2 similarly a2 = pi/8 * b^2 and a3 = pi/8 * h^2 Thus putting in (a1+a2)/a3 = p^2 + b^2 / h^2 = 1 IMO A” October 10, 2011 cans posted a reply to Vague PS in the Problem Solving forum “x'' = x+1 (x+1)^2 - (x^2)'' = x^2 + 2x + 1 - (x^2 + 1) = 2x IMO D” October 10, 2011 cans posted a reply to Swordsman-CR in the Critical Reasoning forum “not D because he is already willing to work hard...... Then it should take less than 10 and not 20..” October 10, 2011 cans posted a reply to need help on exponential equations problem: what did i do wr in the GMAT Math forum “in the 3rd step, you wrote a equation: -2y = y^2 and you divided by y. when you divided by y, you by default assumed that y is not 0. the exact way to solve the equation is : y^2 + 2y = 0 or y(y+2)=0 thus either y=0 or y=-2. and thus you don''t have unique solution.” October 10, 2011 cans posted a reply to Tough MEAN, MEDIAN question...Please help me in the Data Sufficiency forum “S(s) = S(t). N(s)>N(t)???? A) avg(s) < avg(t) S(s)/N(s) < S(t) / N(t) S(s)/N(s) - S(s)/N(t) <0 S(s)* (N(t)- N(s))<0 now if sum >0, N(t) < N(s) and is sum <0, N(t) > N(s) insufficient B) median(s) > median (t) insufficient A&B) insufficient IMO E” October 10, 2011 cans posted a reply to Please help in CR question in the Critical Reasoning forum “Is it B” October 10, 2011 cans posted a reply to Standard Deviation- Manhattan in the Problem Solving forum “My solution: standard deviation (sd) means how far the numbers are from the mean... the present numbers are 2,4,5,7 if we add 3 or 6, they lie in the range only and similarly 1,8 re just next to 2 and 7 respectively which are already in the set. 14 is too far from 7, and thus will increase sd the ...” October 10, 2011 cans posted a reply to Sequences, Series in the Data Sufficiency forum “Rn = Rn-1 + 3 A) first term=15. but with n, (no. of terms, median will vary) insufficient B) mean= 36 in arithmetic progression, mean=median thus median=36 IMO B” September 26, 2011 cans posted a reply to Range in the Problem Solving forum “sum of 5 numbers = 55*5 = 275 median=55 smallest=a,largest=3a+20 range = 2a+20. for max range, a should be max. also let other 2 numbers be b,c 4a + 20 + b+ c = 220 4a + b+c = 200 b min can be a and c min can be 55. 4a+a+55=200 or 5a = 145 a=29 range=2a+20 = 78” September 26, 2011 cans posted a reply to Divisibility Problem in the Problem Solving forum “35x and 20y. 35x = 5*7*x and 20y = 5*4*y a) 5 is possible. E) when y=35x possible D) when x=20y, possible take C) if 20x is GCD, 20x = 5*4*x. but 35x is 5*7*x. how can we get 4?? not possible” September 26, 2011 cans posted a reply to Powerscore CR vs Manhattan CR Guide in the Critical Reasoning forum “+1 for powerscore bible” September 26, 2011 cans posted a reply to Arrangements and Divisibility in the Problem Solving forum “IMO D” September 26, 2011 cans posted a reply to 3 digit No.s in the Problem Solving forum “correct” September 26, 2011 cans posted a reply to Inequalities in the Data Sufficiency forum “|x-y| > |x-z| ? A) |y| > |z| y=2,z=1 and x>2, x-2 > x-1 false y=-2,z=-1, and x>2, x+2 > x+1 true. Insufficient B) x<0 insufficient A&B) x<0 and |y| > |z| a=-x and a>0 |a+y| > |a+Z| ?? if y,z>0, true if y,z<0, and a>|y|, like y=-2,z=-1, ...” September 25, 2011 cans posted a reply to Average Speed in the Data Sufficiency forum “IMO D” September 25, 2011 cans posted a reply to Factors in the Problem Solving forum “Is the question correct?? because 500 is also factor or 50!..” September 25, 2011 cans posted a reply to Like/Just as in the Sentence Correction forum “like” September 24, 2011 cans posted a reply to shoppers in the Sentence Correction forum “IMO D” September 24, 2011 cans posted a reply to Help Required - Number Properties in the Data Sufficiency forum “n students, m rooms 3 < m < 13 < n n/m ?? A) 3n/m is integer. insufficient. if n/m = 16/6, not integer. but 3n/m is integer if n/m = 16/4, integer, 3n/m also intger B) 13n/m is integer. m<13 and 13 is integer. thus n/m is also integer. IMO B” September 24, 2011 cans posted a reply to GMAT1:660,GMAT2:690..Should I quit my MBA plans ? in the GMAT Strategy forum “690 is not bad score. Just don''t give up. Check out where you went wrong and don''t compare your scores with your friends''s scores. And GMAT score is not the only thing that you need for your school. Work on your resume and other aspects. Good luck :)” September 24, 2011 cans posted a reply to Driver's license - grockit in the Sentence Correction forum “IMO E” September 24, 2011 cans posted a reply to Public museum in the Sentence Correction forum “E” September 24, 2011 cans posted a reply to integer in the Data Sufficiency forum “(n-1)(n+1)/24 A) if n=3, r = 8, if n=5, r=0 insufficient B) if n=2,r=3 and if r=5,r=0. insufficient A&B) if n not divisible by 2, (n-1),(n+1) are 2 even consecutive integers. thus their product is divisible by 8. and also n not divisible by 3, thus one of (n-1) or (n+1) divides 3. thus r=0 ...” September 24, 2011 cans posted a reply to 1000 SC 557 in the Sentence Correction forum “IMO B” September 24, 2011 cans posted a reply to Tricky SC in the Sentence Correction forum “IMO E” September 24, 2011 cans posted a reply to LCD and GCM in the Data Sufficiency forum “A) x=y=10,not x=2,y=5, not sufficient B) x=y=100, yes. thus sufficient IMO D” September 24, 2011 cans posted a reply to Arrangements in the Problem Solving forum “8C5. IMO C” September 24, 2011 cans posted a reply to SC: Airspace in the Sentence Correction forum “IMO E” September 24, 2011 cans posted a reply to Permutations in the Problem Solving forum “10C4. (select any 4 numbers. way of arranging them=1) 10C4 = 10*9*8*7/24 = 210” September 24, 2011 cans posted a reply to apluggin in in the Problem Solving forum “A,B -> price=p x,y (number sold) x+y = 10000 5% of px + 7% of py = 660 p(5x+7y) = 66000 p(5(x+y) + 2y) = 66000 50000p + 2py = 66000 p=2 is not possible. if p=1, 2y=16000 or y=8000 then x=2000 thus 2000/10000 = 1/5 IMO D” September 24, 2011 cans posted a reply to Sequence question in the Problem Solving forum “f(n)=2f(n-1)+2=2(f(n-1)+1) for unit number 8, f(n-1)+1 should end either in 9 or in 4. thus f(n-1) should end in 8 or 3. f(1)=1,f(2)=3,f(3)=8 now as f(3) ends in 8, f(4) will end in 8 and thus f(5) will also end in 8 and so on.... thus till f(15), 13 IMO E” September 24, 2011 cans posted a reply to probability in the Data Sufficiency forum “even numbers: 5 (2,4,6,8,10) A) both white and even=0. insufficient B) p(white)-p(e) = 0.2 but we need to find p(w) + p(e) - p(ew) insufficient IMO E” September 24, 2011 cans posted a reply to Question from Quantitative Review in the Data Sufficiency forum “B) D” September 24, 2011 cans posted a reply to a data from gmat forum in the Data Sufficiency forum “A) 150a = 450b or a=3b insufficient B) ab is cube. insufficient A*B) ab = 3b^2 is cube. b=3 will do, also b = 24 will do... insufficient IMO E” September 24, 2011 cans posted a reply to Question from Quantitative Review in the Data Sufficiency forum “A” September 24, 2011 cans posted a reply to a data from gmat forum in the Data Sufficiency forum “20% people: 30+ + bilingual???? A) 25% of b is 30+. but we don''t know how many are b. if b is only 5%, then only 1.25% is 30+ + b and if b=80%, 20% is 30+ +b. insufficient B) we don''t know how many men, how many women, and how many atleast 30 years old Insufficient A&B) ...” September 24, 2011 cans posted a reply to Standard deviation in the Data Sufficiency forum “m,d B) 16% less than m-d. as symmetrical wrt to m, thus 16% greater then m+d sufficient A) 68% in interval. thus 32% outside interval. thus 16% greater than m+d (symmetry) IMO D” September 24, 2011 cans posted a reply to a data from gmat forum in the Data Sufficiency forum “c but not b?? A) 90%c and 55% not b. insufficient B) b=c/2 insufficient A&B) combined, insufficient IMO E” September 24, 2011 cans posted a reply to Statistics Problem in the Problem Solving forum “let sum of other 4 numbers=x and 5th number be y. then x+y = 6.8*5 = 34 also x+3y = 5*9.2 = 46 2y = 12 and y=6 (take difference between means and divide by 3 is incorrect because mean is not multiplied by 3)” September 23, 2011 cans posted a reply to problem solving ques in the Problem Solving forum “A: 4 + (x-4)/2 = (x+4)/2 remaining = (x-4)/2 Bob: 4+ 1/3 [(x-4)/2 -4] = 4 + (x-12)/6 remaining = (x-12)/3 = 32 thus x-12 = 32*3 or Bob: 4 + 32*3/6 = 20” September 23, 2011 cans posted a reply to how can i solve this using the matrix instead of a venn in the Problem Solving forum “25 = 20 + 18 -both or both=13” September 23, 2011 cans posted a reply to Picking friends in the Problem Solving forum “3 people have exactly 2 sibling. thus a,b,c are siblings. d,e are siblings and f,g are siblings total ways of selecting 2 people = 7C2=21 not siblings = total - siblings siblings = select either of the 2 two persons group (either (d,e) or (f,g)) thus 2 ways or select 2 people from 3 person ...” September 23, 2011 cans posted a reply to OG quant probability in the Problem Solving forum “select 2: 4C2. they are girls: (1/2)(1/2) other 2 are boys: (1/2)(1/2) thus 4C2*1/16 = 3/13” September 23, 2011 cans posted a reply to The temp of a cup of coffee. in the Problem Solving forum “T = 120(2^-at)+60 120 = 120 (2^(-10a)) + 60 -10a = -1 or a=1/10 thus for 30 min, at = 3 or -at = -3 thus temp = 120 (2^ (-3)) + 60 120/8 + 60 = 75 IMO B” September 23, 2011 cans posted a reply to standard deviation in the Problem Solving forum “mean=20, sd=3. 2.5sd = 2.5*3 = 7.5 thus more than 2.5sd from mean = 20 +- 7.5 more than 27.5 or less than 12.5 IMO A” September 23, 2011 cans posted a reply to SC-28 in the Sentence Correction forum “IMO D” September 23, 2011 cans posted a reply to SC-20 in the Sentence Correction forum “D” September 23, 2011 cans posted a reply to OG10 -113 in the Sentence Correction forum “IMO D” September 23, 2011 cans posted a reply to Circular Permutation in the Problem Solving forum “You arranged men and women, but the way you arranged children, men and women won''t be alternate.. Men and women: 9! 10! Now for children, just take one place and arrange them: 20C1*10! correct me if I misunderstood the question” September 23, 2011 cans posted a reply to Ditrama in the Critical Reasoning forum “premise: each region receives share in proportion to total population share... Premise: % revenue received were decreased for Korva, but population increased... conclusion? A)doesn''t matter. B) it can be possible that population grew by larger % C) let M and G each had x people and each''s ...” September 23, 2011 cans posted a reply to The increase in real GDP in the Sentence Correction forum “IMO reflected,spending, investment...” September 23, 2011 cans posted a reply to a data from gmat forum in the Data Sufficiency forum “volume=abc i think in A) value of a is mentioned IMO C” September 23, 2011 cans posted a reply to DS INTEGER in the Data Sufficiency forum “X= 3^N AND Y= 3^M . IS X >2Y ?? 3^n > 2*3^m ?? A) n=m+1. thus lhs = 3*3^m. as 3>2 sufficient B) n=2M. 3^(2m) > 2* 3^m ?? or 3^m * 3^m > 2*3^m or 3^m>2??? if m=0, 1>2 false if m=1, 3>2 true Insufficient IMO A” September 22, 2011 cans posted a reply to HELP in the Data Sufficiency forum “A,B for x sec and C for x+2 sec distance by A=y B=3y thus 3y/x - y/x = 2000 -> y/x=1000 C''s speed = y/x = 5y/(x+2) x=1/2. thus y = 500 IMO C” September 22, 2011 cans posted a reply to Gmat Prep. Gmat experts pls explain with tabular format in the Data Sufficiency forum “2/3 l'' (dislike lima beans) 1/3 l (2/3)*(3/5) l''b'' (dislike both beans and sprouts) 2/5 l''b'' also (2/3)(2/5) l''b = 4/15 bl''?? A) total 120. 4/15 of 120 = 32 sufficient B) l=40. thus 1/3 of x = 40 or total=120 Sufficient IMO D” September 22, 2011 cans posted a reply to a cr from Gmat in the Critical Reasoning forum “Is it C?” September 22, 2011 cans posted a reply to GMATPrep PS Function in the Problem Solving forum “f(x)=f(1-x)? a) f(1-x) = 1- (1-x) = x != f(x) incorrect b) f(1-x) = 1 - (1-x)^2 = 1 - (1+x^2 - 2x) = 2x - x^2 !=f(x) incorrect c) f(1-x) = (1-x)^2 - (1-(1-x))^2 = (1-x)^2 - x^2 = -f(x) incorrect d) f(1-x) = (1-x)^2 *(1-(1-x))^2 = (1-x)^2 * (x)^2 = f(X) correct e) f(1-x) = (1-x)/x = 1/f(x) ...” September 22, 2011 cans posted a reply to Combinations - 700+ in the Problem Solving forum “if all the three numbers are different: 6C3 = 20 if 2 numbers are same: 6C2*2 = 30 if all three are same: 6C1 = 6 IMO C” September 22, 2011 cans posted a reply to Circles DS in the Data Sufficiency forum “let radius =r. and XY bisects AO at B. BO = r/2 also in triangle XOB, XB is perpendicular to OB. sin OXB = (r/2)/r = 1/2 thus OXB = 30 and thus XB = root(3) * r/2 and XY = root(3)*r Thus we need to find r. A) 2 pi r = 2* pi r r or r=1 sufficient B) XY subtends 120 degree at centre. ...” September 22, 2011 cans posted a reply to CR- gmatprep in the Critical Reasoning forum “Premise: from 1973 to 1976, c''s consumption increased by 3.4%, sales of t rose 18% and total population: 5% There is no assumption. and we have to find the conclusion / interference A) nothing is mentioned about profit / prices. So we can''t conclude D) similar to A. E) we just know that c''s ...” September 22, 2011 cans posted a reply to GMATPrep DS Questions Help in the Data Sufficiency forum “4th: y miles: x m/h and 40-y: 1.25x t1 = y/x + (40-y)/1.25x = 160-y / 5x t2 = x m/h for 40 miles. means t2 = 40/x hr. t1 is what percent of t2?? let p% then t1 = p/100 * t2 -> (160-y)/5x = p/100 * 40/x p = (160-y)/2 B) gives value of y. thus sufficient IMO B” September 22, 2011 cans posted a reply to GMATPrep DS Questions Help in the Data Sufficiency forum “answer to 3rd: m/r =x/y ???? A) m/y = x/r or mr=xy. Insufficient B) m+x / r+y = x/y so we have to check whether (m+x)/(r+y) = m/r insufficient x,y are different.. A&B) x=mr/y thus (m+x)/(r+y) = (m+ (mr/y))/(r+y) = m (r+y) / y(r+y) = m/y true only when y=r. insufficient IMO E” September 22, 2011 cans posted a reply to GMATPrep DS Questions Help in the Data Sufficiency forum “answer to 2nd: x=-a and -b. A)a+b = -1. insufficient (a=b=-0.5 possible and also a=-0.7 and b=-0.3 possible) B) (0,-6) thus ab = -6 insufficient A&B) a+b = -1 and ab=-6 -3,2 are the only 2 values. Sufficient IMO C” September 22, 2011 cans posted a reply to PS in the Problem Solving forum “P(x,-7) distance from y-axis = x distance from x-axis = -7. -7 = x/2 thus x = -14 or P is 14 units from y-axis. IMO E” September 22, 2011 cans posted a reply to a data from gmat forum in the Data Sufficiency forum “let number of people taking CT = x then both = 15% of x = 15x/100 A) both = 10y/100 (where y=# who take improvisation) insufficient B) x+y = 450.. insufficient A&B) 15x/100 = 10y/100. 3x=2y. also 2x+2y=900 or 5x=900 or x=180 Thus both = 15x/100 sufficient IMO C” September 22, 2011 cans posted a reply to GMATPrep PS Questions Help in the Problem Solving forum “Answer to the 1st one: D” September 22, 2011 cans posted a reply to GMATPrep DS Questions Help in the Data Sufficiency forum “answer to 1st: A: highest= g, and smallest = g-r (as r is the range) B: h, h-s g-r > h-s?? or g+s> h+r?? A) r<s Insufficient. no info about g,h B) g>h Insufficient. no info about r and s. A&B) s>r and g>h thus g+s > h+r IMO C” September 22, 2011 cans posted a reply to P & C in the Problem Solving forum “A,B,C before F,G,H Arrange A,B,C: 3! = 6 ways arrange F,G,H: 3! = 6 ways now select any one combination and there are 7 spaces. select 1 and place D. now 8 spaces, place e: 8c1 and = 6*6*7*8 = 2016 IMO D” September 22, 2011 cans posted a reply to Astronomers and Massive Planets in the Sentence Correction forum “which circle and ''and circling'' are incorrect thus C and E left. most of them at least as large as Jupiter is better IMO C” September 22, 2011 cans posted a reply to Radical Problem in the Problem Solving forum “√(9+√80)=A and √(9-√80)=B thus (a+b)^2 = a^2 + b^2 + 2ab a^2 = (9+√80) b^2 = (9-√80) ab=√(9+√80)√(9-√80) =√[(9+√80)(9-√80)] (x+y)(x-y) = x^2 - y^2 thus ab = √(9^2 - (√80)^2) = 1 2ab=2 thus final ans = (9+√80) + (9-√80) + 2 = 20” September 22, 2011 cans posted a reply to Kilograms to grams; volume in the GMAT Math forum “800kgs -> 1 cubic m = 10^6 cubic cm 8 * 10^5 gm = 10^6 cubic cm or 1 gm = 10/8 = 1.25 IMO B” September 22, 2011 September 21, 2011 cans posted a reply to Numbers in the Problem Solving forum “2n + S(n) = 1998. C) 17 not possible. then sum will be odd. E) 20. n=989. S(n)!=20 D) 22. n=988 not A) 24. 987. sum=24 IMO A” September 21, 2011 cans posted a reply to Need expert help - 2 different answer with 2 diff methods in the Data Sufficiency forum “Squaring with equal to sign is simple. lets say a=b then a^2=b^2 But with <, > sign its not that simple... -2>-4 but when you square, 4>16 is not true... Thus when you square sqrt(x) < 2.5x-5, you must consider 2.5x-5>=0 or x>=2. That''s why when you chose x=2, it worked and ...” September 21, 2011 cans posted a reply to Functions in the Problem Solving forum “f(k) = k^5/16, what is f(2k) in terms of f(k)?? f(2k) = (2k)^5/16 = 2^5 * k^5/16 = 32*f(k) IMO E” September 21, 2011 cans posted a reply to Alternate method in the Problem Solving forum “using options is better. But here goes the algebraic solution: let min colors be n. then n + nc2 >=12 or n(n+1)>24 if n=4, 20<24 n=5, 30>24” September 21, 2011 cans posted a reply to Goto College in the Critical Reasoning forum “http://www.beatthegmat.com/likelihood-that-their-children-will-attend-college-t91126.html This link has the same question with explanation.....” September 21, 2011 cans posted a reply to Tough critical reasoning question in the Problem Solving forum “IMO D” September 21, 2011 cans posted a reply to Veritas CR in the Critical Reasoning forum “Q: how to improve chemical sprays usefulness?? A) Chemically stable sprays will also have the same side effects.. C) That will create more troubles d) spraying portion or full house is irrelevant E) if insects are resistant to chemical sprays, how will we get rid of them?? B) As last line ...” September 21, 2011 cans posted a reply to Tuberculosis and Country X in the Critical Reasoning forum “IMO B” September 21, 2011 cans posted a reply to Good one from1000 SC in the Sentence Correction forum “IMO D” September 21, 2011 cans posted a reply to Greek theology : need help . in the Sentence Correction forum “IMO D” September 21, 2011 cans posted a reply to SC-9 in the Sentence Correction forum “IMO C” September 21, 2011 cans posted a reply to SC-10 in the Sentence Correction forum “IMO E” September 21, 2011 cans posted a reply to SC-14 in the Sentence Correction forum “IMO C” September 21, 2011 cans posted a reply to SC-7 in the Sentence Correction forum “B) incorrect. compare Bryon''s death with Jack London.... E) changes the meaning... D) incorrect IMO C” September 21, 2011 cans posted a reply to Doubt-Expert Reply Needed in the Sentence Correction forum “IMO D would is used for hypothetical cases..” September 21, 2011 cans posted a reply to Inference question in the Reading Comprehension forum “the topic discusses about "indirect purchases" where "supplier partnerships" are favored. D) Its just mentioned that competitive scrutiny is typically limited to suppliers of items that are directly related to end products Nothing mentioned about "supplier ...” September 21, 2011 cans posted a reply to Veritas CR in the Critical Reasoning forum “IMO D A) but it also decrease the revenue B) lines inside is out of scope C) we are talking about people who wait in line.... not about people who have passes. D) If people don''t prefer overcrowding, they might not come... E) % and numbers are different.” September 20, 2011 cans posted a reply to linear programming in the Problem Solving forum “let a and b units of A and B respectively. profit = 20a + 45b also 40a+80b = 200,000 or a+2b = 5,000 and 6a+8b=24000 or 3a+4b = 12000 solving these 2, a=2000 or b=1500” September 20, 2011 cans posted a reply to Inequalities & Powers in the Data Sufficiency forum “s^4 * v^3 * x^7 <0 s^4 >=0 thus v^3 * x^7 <0 v^2*x^6 * vx<0 thus vx<0. is svx<0?? we know vx<0, thus we have to find whether s>0?? A and b are both insufficient as nothing is given about s...” September 20, 2011 cans posted a reply to Wordy problem in the Data Sufficiency forum “a,b. and a>b a/4 > 5b or a>20b... b<4??? A) a>70. if a=80,b<4 and if a=120, b<6. insufficient B) a<80 or 20b<a<80 or b<4 IMO B” September 20, 2011 cans posted a reply to Few more permutations/combination questions in the GMAT Math forum “as books of each type are together, let bundle be: M,E,R. Thus 3! ways to arrange the bundles. Now internally in the bundles, the books can be arranged. Maths 3! and so on...” September 20, 2011 cans posted a reply to advanced DS problem in the Data Sufficiency forum “A) if a>0, a+c = b?? and if a<0, c-a=b?? Insufficient No info is given. b) a<0. insufficient A&B) c-a=b?? we know b!=a+c.. but we can''t say b=c-a. IMO E” September 20, 2011 cans posted a reply to town planning in the Critical Reasoning forum “A) if mixed success, then critics can be wrong.. B) doesn''t support critics.. C) irrelevant IMO D” September 20, 2011 cans posted a reply to Few more permutations/combination questions in the GMAT Math forum “arrange 4 men: 3! (round table) Now 4 spaces and 4 women: 4! 3!*4! 13^4 * 48C2” September 20, 2011 cans posted a reply to Few more permutations/combination questions in the GMAT Math forum “arrange 7 white balls: 1 way. no. of gaps = 8 pick any 5 spaces and put black balls. 8C5. Arrange them:1 thus 8C5 7C2 (for Jill) * (2^5 - 1 -1) (2^5 because each of the sweet can be given to any of the 2 persons. -1 and -1 because in case all the sweets given to only Jack or to only ...” September 20, 2011 cans posted a reply to Few more permutations/combination questions in the GMAT Math forum “for the middle letter: 5 options. 21 consonants. 21*5*21 (its not mentioned that letters can''t be repeated)” September 20, 2011 cans posted a reply to Few more permutations/combination questions in the GMAT Math forum “Assuming one finger can have all the 5 rings: 4^5. (4*4*4*4*4) 3!*3!*4!*4!” September 20, 2011 cans posted a reply to Data Sufficiency . in the Data Sufficiency forum “(a/b) (c/d) > c/b? or (a/d)(c/b) > c/b as c,b are positive, thus a/d>1 or a>d??? c>b. insufficient a>d sufficient IMO B” September 20, 2011 cans posted a reply to Positive Negtive in the Data Sufficiency forum “IF ab/cd>0 is bc>cd??? B) b<c<0. as c is less than 0, we have to find if b<d??? as b<0, then proving that d>0 will be sufficient. ab/cd >0 and both b,c are less than 0, thus a/d >0. now if a<0, d<0 And thus insufficient I don''t think b is the ans..” September 20, 2011 cans posted a reply to UFO in the Sentence Correction forum “its is referring to public''s... its is a possessive pronoun and can thus refer to possessive noun (public''s)” September 20, 2011 cans posted a reply to OG 12 Question in the Sentence Correction forum “The second one is correct according to me...” September 20, 2011 cans posted a reply to PS- P & C in the Problem Solving forum “IMO A AABBBCDE total arrangements: 8!/3!2! Thus C right to D: 8!/3!2!2 (in half it will be to the left of D and in other half to the right of D) thus 1680” September 20, 2011 cans posted a reply to Perfect 'Past perfect' Q! in the Sentence Correction forum “IMO D” September 20, 2011 cans posted a reply to Water conservation techniques in the Critical Reasoning forum “i will also go with B Criticism talks about people with yards... C) talks about people without yards. How can it refute the criticism?? B) Home owners will save less on water bills, but they can save on fertilizer and herbicide and thus the expense of converting can be justified..” September 20, 2011 cans posted a reply to OG 12 Question in the Sentence Correction forum “D is correct. (As that agreement is still valid and still municipalities follow the regulation..) Thus the effect: amount municipalities are allowed to dump is still reduced..” September 20, 2011 cans posted a reply to UFO in the Sentence Correction forum “the public''s widespread belief... (belief is singular) Thus have is incorrect Eliminate C and E. B) is also incorrect.. (and they are...) IMO D in A, their refers to what??” September 20, 2011 cans posted a reply to should he pass the exam, he will graduate in the Sentence Correction forum “should is not used for prediction or conditions....” September 20, 2011 cans posted a reply to SC question from GMAC Paper test 14 in the Sentence Correction forum “ImO B and IMO B” September 20, 2011 cans posted a reply to Supreme Court in the Sentence Correction forum “OA A??” September 20, 2011 cans posted a reply to Diseases in the Critical Reasoning forum “IMO E A) Author doesn''t assume this... B) cure is irrelevant E) as author says many diseases have developed and been eradicated. But what if they have been developed by men''s interference?” September 20, 2011 cans posted a reply to Agricultural Board in the Critical Reasoning forum “IMO E A) its not mentioned anywhere B) maybe they improve production but they are waiting for approval.. C) Maybe Board is responsible D) Not mentioned E) New plants and seeds to improve agricultural production should be approved by board. as boad has approved, they will improve production” September 20, 2011 cans posted a reply to As well as? in the Sentence Correction forum “"Polygmay is common for Christians as well as Muslims here" i will say: "Polygmay is common for Christians as well as for Muslims here"” September 20, 2011 cans posted a reply to swim, dance and drive in the Problem Solving forum “total 144. not swim=89 or swim = 144-89 = 55 dance: 44 car: 53 atleast 2 =37 all 3:6 thus exactly 2 = 37-6 = 31 thus 144 = 55+44+53 + none -31 -2*6 none = 35 IMO D” September 20, 2011 cans posted a reply to Mixtures in the Problem Solving forum “A: 20% alcohol and 80% juice B: 40% alcohol and 60% juice. 1/2 -> pure alcohol (2/5)(1/2)*80% juice = 4/25 + (3/5)(1/2)*60% juice = 9/50 Thus juice = 8/50 + 9/50 = 17/50. alcohol = 1 - 17/50 = 33/50 ratio: 17:33 IMO D” September 19, 2011 cans posted a reply to ambiguous pronoun it mgmat qb Cotton Gin in the Sentence Correction forum “A) is incorrect because of had turned cotton... (past perfect is not required) B) having been one of the.... is incorrect... D) ''it'' doesn''t have proper reference. (whereas ''it'' had..) C and E , don''t know. C) however costly previously looks weird and in E) being looks bad.. will pick E,” September 19, 2011 cans posted a reply to A bone flute in the Critical Reasoning forum “IMO E premise: fragment of bone flute found. conclusion: the diatonic musical scale was developed and used thousands of years before it was adopted by Western musicians A) doesn''t matter.. B) again irrelevant to the conclusion C) we are not concerned about the material from which flute was ...” September 19, 2011 cans posted a reply to Circular probability in the Problem Solving forum “well arrangement will be: FEDCBAF (I wrote F twice to show its circular..) There are 2 arrangements: (anti clockwise or clockwise) total =(6-1)! (for circular..) thus prob = 2/120=1/60” September 19, 2011 cans posted a reply to Can a two digit number contain a decimal point? in the Data Sufficiency forum “when 2 digit number is mentioned, it means without decimal... A) m=99, n=11 true and if n=12, not true. insufficient B) m+n is multiple of 11. m=12 and n=21 not true, m=11 and n=11, true. Insufficient A&B) m is multiple of 11 and m+n also. thus n is also multiple of 11. or m-n is also IMO C” September 19, 2011 cans posted a reply to Long post, seeking guidance...doubting my intelligence~ in the GMAT Strategy forum “i am not counting mgmat 1 as that was bad because of the time limit. But from 2nd to 5th, your quant score has decreased badly... Why don''t you review quant basics again....? Verbal is more or less consistent although I am sure you can do better...” September 19, 2011 cans posted a reply to Percentage Problem in the Problem Solving forum “E*R=10% (Exceed speed and Receive ticket) let x% exceed speed. thus x/5 don''t get ticket. and thus 4x/5 get ticket 4x/5 = 10 or x=12.5” September 19, 2011 cans posted a reply to Ratios Problem in the Problem Solving forum “5x and 3x initially. 5x-10 / 3x+10 = 7/5 25x-50 = 21x + 70 x=30 thus final: 140 and 100 140-100=40 IMO C” September 19, 2011 cans posted a reply to Prime Numbers in the Problem Solving forum “http://www.beatthegmat.com/gmatprep-function-h-n-t11711.html Refer here..” September 19, 2011 cans posted a reply to Factor Problem in the Data Sufficiency forum “f=30! A) 10^d is factor of 30! d=1, true, d=2, true. Insufficient B) d>6 d=7,8,... insufficient A&B) 30! = (10)^7 * n where n is not multiple of 10. d>6. d=7, 10^7 is factor of 30! 10^8 is not.... Sufficient d=7 IMO C” September 19, 2011 cans posted a reply to Slope of LIne in the Data Sufficiency forum “x-intercept of m>n. m: my = x-p and n: ny=x-q. p>q (x-intercept) also (-2,4) 4m=-2-p and 4n=-2-q. 4(n-m)=p-q or (n-m)>0. or n>m... Slope: 1/m and 1/n... if n>m, how can we say that 1/m < 1/n?????? maybe they are positive or negative........” September 19, 2011 cans posted a reply to Probability question in the Problem Solving forum “sorry a mistake on my part. 4C2=6. (total ways) x+y, x+5y, x-y, 5x-y.. out of these 4 expressions, only (x+y)(x-y) will form the required expression thus 1/6” September 19, 2011 cans started following VivianKerr September 19, 2011 cans posted a reply to combination in the Problem Solving forum “4! is correct. but you have to give 4 prizes... and you have 6. so you have to select those 2 prizes also...” September 19, 2011 cans posted a reply to DS: Divisibility in the Data Sufficiency forum “B) m=15x and n=2y 75x+4y / 45x+2y. 75x+4y = p(45x+2y) (75-45p)x = (2p-4)y x = (2p-4)/(75-45p) *y m,n positive. thus (2p-4)/(75-45p) also positive. either (2p-4)<0 &(75-45p)<0 or (2p-4)>0 & (75-45p)>0 either: p<2. but p is positive integer. thus p=1.75-45=30<0 false. ...” September 19, 2011 cans posted a reply to Long post, seeking guidance...doubting my intelligence~ in the GMAT Strategy forum “you didn''t mention the quant and verbal scores. And there are still 10 days left. You can review ur errors again and understand where is the problem. You can revise particular topics also.... You will do well in final exam.. just don''t give hope.. :)” September 19, 2011 cans posted a reply to work problem-confusion in the Problem Solving forum “J-b and R-2b thus total=3b/hour thus in 4hours: 3b*4 = 12b IMO D the way u did is done for time and not for rate...” September 19, 2011 cans posted a reply to interesting ;) in the Problem Solving forum “a = bh/2 a'' = 1.08*1.06*bh/2 = 1.1448a thus % increase =( 1.1448a - a)/a * 100 = 14.48% IMO D” September 19, 2011 cans posted a reply to combination in the Problem Solving forum “6 prizes. select 4: 6C4 =15 Give them..4! thus 15*24=360 IMO E” September 19, 2011 cans posted a reply to DS: remainder in the Data Sufficiency forum “A) we don''t know R B) we don''t know Q. A&B) Sufficient IMO C” September 19, 2011 cans posted a reply to pls compare if it is possible in the Problem Solving forum “are you sure you are not missing any brackets..? or y=5^x??? assuming y=5^x, 5y = 5* 5^x = 5^(x+1)” September 19, 2011 cans posted a reply to Difficult CR in the Critical Reasoning forum “IMO E B and D are too strong. (None and All...) C) it is mentioned that Acanthostega and its predecessors were aquatic A) Disadvantage is nowhere mentioned.” September 19, 2011 cans posted a reply to DS in the Data Sufficiency forum “t = d+h-5. t+d+h = 2t+5. b) d=2+h. t =2h-3. insufficient A) insufficient A&B) if t,d same age, h=5 and thus total = 19 if t,h same age, d=5 and total = 17. insufficient IMO E” September 19, 2011 cans posted a reply to Brown Country Club in the Critical Reasoning forum “A) nothing mentioned about preapproved or not. C) major concert promoter comes in entertainment industry. incorrect D) Correct.” September 19, 2011 cans posted a reply to Victoria and Albert Museum in the Sentence Correction forum “D is incorrect. among the first of Britain''s national museums doesn''t make sense. will go with C.” September 19, 2011 cans posted a reply to orbit of Jupiter in the Sentence Correction forum “IMO B astronomers is noun and plural and thus won''t be modified by it...” September 19, 2011 cans posted a reply to Airplanes in the Critical Reasoning forum “A) nothing mentioned about ticket price. B) again nothing mentioned. (unprofitable and losing money are not same) C) out of context. nothing is mentioned regarding this. D) irrelevant E) Correct. Conclusion is based on these lines only. (There is no reason to comply with recommendation because ...” September 19, 2011 cans posted a reply to Acid rain in the Sentence Correction forum “IMO D between is there, thus and should be present. Eliminate A and B. chemical reactions is plural, thus C is eliminated. (which has...) E) Acid rain result from chemical reactions to produce doesn''t make sense.....” September 19, 2011 cans posted a reply to Standard Deviation MGMAT 5 in the Problem Solving forum “range and sd are not same. 1) mean = 3. variation = A” September 19, 2011 cans posted a reply to Numbers in the Data Sufficiency forum “A) b=3,a=10. a/b = 10/3 = 3.3333333333 insufficient (3,3) will be terminating B) 25/4: 6.25 terminating 10/3. non terminating Insufficient A&B) 10/3 will still stand IMO E” September 19, 2011 cans posted a reply to Probability Problem in the Data Sufficiency forum “A) FB = .1 (Female and Brown) Insufficient. B) Female - Brown = .25 Insufficient A&B) either F or B means: FB + (Female and not brown) + (brown and nor female) insufficient IMO E” September 19, 2011 cans posted a reply to State X, State Y in the Problem Solving forum “i will go with values.... C) 400. X -> 30 and Y -> 32. nopes D) 500. X-> 40 and Y -> 40 Correct” September 19, 2011 cans posted a reply to Slope of LIne in the Data Sufficiency forum “B) y=mx+p and y=nx+q. q>p (-2,4) 4=-2m+p = -2n+q 2(m-n) = p-q. p-q<0 thus m<n. Sufficient i think it hsould be B. As A is not sufficient” September 19, 2011 cans posted a reply to Factors in the Data Sufficiency forum “a) x is factor of 7200. if x=2, 1 prime factor. if x=6, 2 prime factors Insufficient b)180 is factor of x. x=180*11 or x=180*11*13.. insufficient a&b) 7200/180 = 40. the factors of 40 (2,5) are already in 180. thus sufficient IMO C” September 19, 2011 cans posted a reply to Combinatorics in the Problem Solving forum “total 52 cards. select 1 card each from each deck: 13*13*13*13. now remaining 2 cards can be any. left cards=48. thus 48*47 IMP A” September 19, 2011 cans posted a reply to Prime numbers in the Data Sufficiency forum “if n=15, root(15) = 3. something.. 5> root(15) which is a factor. A) means its prime. any number which is not prime and not square, will have atleast 1 factor greater than root(n) B) same as A... IMO D” September 19, 2011 cans posted a reply to Area in the Problem Solving forum “AOp = 60. therefore area = 30pi + area of triangle. perpendicular: cos 30 = height/6 or height = 3root(3) sin 30 = (base/2)/6 or base = 6 thus area = (1/2)6*3(root(3)) = 9(sqrt3) IMO D” September 19, 2011 cans posted a reply to Is xy > 0? in the Data Sufficiency forum “1 plugged in numbers in 1 and 2, to show they are not sufficient. ant for C), if x>a and x<b we can say that b>x>a or b>a...” September 19, 2011 cans posted a reply to Princeton Test Question CR in the Critical Reasoning forum “See you yourself mentioned that argument doesn''t mention that they are important. its just mentioned that company had them and employees were satisfied. That can be because of other factors also. maybe due to high profitability level....” September 19, 2011 cans posted a reply to Five cards are to be selected at random from 10 cards number in the Problem Solving forum “if median=3, we have to select 1,2,3. then selecting any 2 numbers other than 4,5 will result in mean > median. thus 7C2 - 1 = 20 if median=8, mean max=8. thus 0 way. if median=7, mean max=8: sum of other 4=40-7 = 33. sum max can be: 5+6+9+10=30 0 way. if median=6, mean 7: sum of other 4 ...” September 19, 2011 cans posted a reply to American manufacturers in the Critical Reasoning forum “All the options A,B,C,D are tech stuff except E which is food.... I think that''s why. I am not sure ...” September 19, 2011 cans posted a reply to Princeton Test Question in the Sentence Correction forum “increasingly should modify unrelated thus E is incorrect. to create is better than to the creation of... creating new divisions to their business (in D doesn''t make sense( IMO C” September 19, 2011 cans posted a reply to Is xy > 0? in the Data Sufficiency forum “Your method is correct. 1) x > y-2. x=1,y=-2. xy <0 also x=4,y=3,xy>0 insufficient 2) x < 2y-6. y=3, x=-1, xy<0 and y=4,x=1, xy>0 insufficient 1&2) y-2 < x < 2y-6. thus y>4. and x>y-2 >2 xy>0 Sufficient IMO C” September 19, 2011 cans posted a reply to Princeton Test Question CR in the Critical Reasoning forum “nice one... A) its just mentioned that overall satisfaction level at companies with over$100 million in revenues and benefits including flexible schedules and on-site daycare is high. Nowhere it is mentioned that because of these benefits, level was high. B) again an interpretation which can be ...”
September 19, 2011
cans posted a reply to TV Networks. in the Critical Reasoning forum
“I meant decrease only... Ratings will decrease if winner not predicted..”
September 19, 2011
cans posted a reply to use of Such XXX as and such as XXXX in the Sentence Correction forum
“Idioms are getting washed out? What do you mean by that?”
September 19, 2011
cans posted a reply to Geometry in the Problem Solving forum
“If you take this figure, let side of square=x. then 12 = x + 2XA (XA=DZ) also tan 60 = x/XA -> XA = x/root(3) 12 = x + 2x/(root(3)) x = [12*root(3)] / (2 + root(3))”
September 19, 2011
cans posted a reply to Geometry in the Problem Solving forum
“but that''s not symmetrical. (Y and Z have different view)”
September 19, 2011
cans posted a reply to Prime numbers in the Data Sufficiency forum
“k= 2*3*5*7*11..*29 +1 II) K has prime factor greater than 29. True because for any prime factor less than equal to 29, lets say 17, 2*3*5*7*11..*29 will be divisible by 17 and thus we will get 1 as remainder. Similarly for say 23, 2*3*5*7*11..*29 is divisible by 23 and thus k will have remainder ...”
September 19, 2011
cans posted a reply to 2 questions- Roy Wilkins & Strike in the Sentence Correction forum
“1st : IMO B (that is necessary.. ) 2nd: IMO B”
September 19, 2011
cans posted a reply to Eight people are to make photo in the Problem Solving forum
“2 ppl: 1 way (1 2) 4 ppl: 2 ways: 12 or 13 34 24 6 ppl: 13 2 ways + 12 2 ways + 123 1 way = = 5 2 6 3 6 456 8 ppl: 13 6 ways (same as 6 ppl) + 123 4 ways + 125 2 ways + 124 2 ways 2 8 8 34 8 ...”
September 19, 2011
cans posted a reply to Geometry in the Problem Solving forum
“what do you mean by symmetrically inscribed? Because if a square is inscribed i think it means that all the four corners lie on triangle. and there are only 3 sides.”
September 19, 2011
cans posted a reply to Is quadrilateral MNPQ Rectangle? in the Data Sufficiency forum
“A) insufficient. |\ |_| It can be like this which is not rectangle or it can be square. B) at least 3 angles are right angles and thus 4th is also right. (sum=360) thus IMO B[/img]”
September 19, 2011
cans posted a reply to Complicated Absolutes! in the Data Sufficiency forum
“|x| + |y| = 32. A) -4x-12y = 0 or x+3y=0. x=-3y. thus |x|+|y| = |3y| + |y| = 4|y|=32 or |y|=8 xy = -3yy = -3y^2 = -3*64 = -192 Sufficient B) |x| - |Y| =16. |x|=24 and |y| = 8 |xy| = 192 But xy can be negative or positive. Insufficient IMO A”
September 19, 2011
cans posted a reply to P Value in the Problem Solving forum
“h(n)=2*4*6...*n h(100)+ 1=2*4*6*8*...100 = 2^50(1*2*3*..*50) +1 p is prime factor and thus p divides h(100)+1. thus p>50.. IMO E”
September 19, 2011
cans posted a reply to Jogging track- in the Problem Solving forum
“radius=1 mile. Thus circumference = 2*pi t = 2*pi/3 = 44/21=2.0... IMO C”
September 19, 2011
cans posted a reply to how many employees are trained to work in all 3 restaurants? in the Problem Solving forum
“f,d,s. 19->f, 18->d and 12->s 4-> 2 x->3 Thus 39 = 19+18+12 - 4 (exactly 2..) + x x=6”
September 19, 2011
cans posted a reply to What percent of the students at Jefferson .... in the Problem Solving forum
“FS'': (not spanish means s'' and french means f) A) 30% F insufficient B) 40% s'' -> 60% S insufficient A&B) 100% = 30% + 60% - FS (both F and S) + none (some students don''t study both) Thus insufficient IMO E”
September 19, 2011
cans posted a reply to If (x # y) represents the remainder.... in the Problem Solving forum
“y=3,5,15, Sum=23”
September 19, 2011
cans posted a reply to The total cost of producing item X.... in the Problem Solving forum
“X = o + p. x'' = o + .95p A) x'''' = 1.13o + .95p Insufficient as we can''t find actual percent B) o=5p. thus X = 6p. but we don''t know by how much o increases. A&B) o=5p. x=6p o'' = 1.13*5p.5.65p p'' = .95p thus x'' = 5.65p + .95p = 6.6p Thus we can find % change IMO C”
September 19, 2011
cans posted a reply to 0 raised to 0 as per gmat ? (Need expert help) in the Problem Solving forum
“i don''t think that will come in any question..”
September 19, 2011
cans posted a reply to J's salary and P's salary in the Data Sufficiency forum
“j''s initital = x. final = (1+ p/100)x similarly K''s: (1 + p/100)y A) y = 2000 + x insufficient. B) (1+ p/100)y = 2440 + (1+ p/100)x insufficient A&B) (1+ p/100)y = 2440 + (1+ p/100)x -> (1 + p/100) (y-x) = 2440 (1 + p/100)2000=2440. solve for p IMO C”
September 19, 2011
cans posted a reply to Missy and caryn in the Data Sufficiency forum
“let m''s general allowance = x. then c''s = 2x and m''s allowance for laundry = 3x. m''s total = ax + 3xb and c''s = 2xc ax + 3xb = 2xc or a + 3b = 2c (where a is hours spent on simple tasks by m, b is hours spent by m on laundry and c is hours spent by c) Assuming they worked same number of ...”
September 19, 2011
cans posted a reply to Statistics -Pls help me to solve this problem in the Problem Solving forum
“let n sales. then total = 400n Also previous average = 400-150=250 Thus (n-1)(250) + 1000 = 400n 10n - 10 +40 = 16n -> n=5. thus including this sale, he has made 5 sales in total..”
September 19, 2011
cans posted a reply to Business School Problem in the Data Sufficiency forum
“100 attendees. A) Maybe attendees are all from different schools. or maybe same Insufficient B) on average, 10 attendees per school. there age can be 21,22...30 or 21,21,...21 Insufficient A&B) range=22 to 30: 22,23...30 (total 9 ages..) also 10 business schools. therefore atleast one ...”
September 18, 2011
cans posted a reply to Machines OG in the Problem Solving forum
“1/3 + 1/5 = 1/T is used when we know that 1 bolt can be made in 3 sec by A and in 5 sec by B and thus in T sec (combined) A 1 bolt: 1/3 sec B 1 bolt: 1/5 sec Thus time taken combined for 1 bolt = T 1/T = 1/(1/3) + 1/ (1/5) = 8 This T = 1/8. 1 bolt can be made in 1/8 sec or in 1 sec we can make ...”
September 18, 2011
cans posted a reply to new style of aircraft in the Sentence Correction forum
“B) Incorrect: By skimming along the top... modifies aircraft and not proponents E) again modifier is not placed correctly. C) incorrect IMO A”
September 18, 2011
cans posted a reply to use of Such XXX as and such as XXXX in the Sentence Correction forum
“I think B”
September 18, 2011
cans posted a reply to Exponent Problem in the Problem Solving forum
“2^(x-2) to (2^x)/4 lhs: (2^x)*(2^(-2)) = (2^x)/4”
September 18, 2011
cans posted a reply to NO. PROPERTIES in the Data Sufficiency forum
“median = (l+m)/2 and mean = (j+k+l+m+n+o)/6 mean>median??? B) k+o = l+m. also j<k and n<o, then j+n < l+m thus mean < 3(l+m)/6 < median. Sufficient A) n+o > 2(j+k) thus (j+k+n+o+l+m ) /6 > (3(j+k) + l+ m ) /6 mean > (3(j+k) + l+ m ) /6 (3(j+k) + l+ m ) /6 > ...”
September 18, 2011
cans posted a reply to Fat Intake in the Critical Reasoning forum
“Premise: parents consume more fat than adults without children Conclusion: more fat is because of pizza/cookies. weaken: A) if parents spend more on pizza then probably this is the reason. Incorrect D) out of context E) This study says most. (We are not concerned with all..) C) children ...”
September 18, 2011
cans posted a reply to DS: MEAN in the Data Sufficiency forum
“median = x and max value = 3x. largest average means all the numbers should be max. 5th number=x (median) 6th,7th,8th,9th = 3x,3x,3x,3x 1st,2nd,3rd,4th=x,x,x,x (they can''t be greater than x) mean = 17x/9 IMO B”
September 18, 2011
cans posted a reply to NO. PROPERTIES in the Data Sufficiency forum
“B) x > 3^20 or x>9^10. Insufficient. x can be 11^10 or (9.5)^10. A) x= 9^11. Sufficient. (its either less or not less but we have only one answer) IMO A”
September 18, 2011
cans posted a reply to Statue of Liberty in the Sentence Correction forum
“A) is concise. like can be used as we mean similar to...”
September 18, 2011
cans posted a reply to DS INTEGER in the Data Sufficiency forum
“(x + 3)(x2 + 3x + 2) = (x+1)(x+2)(x+3) A) x is odd. thus (x+1),(x+3) are consecutive even integers. thus divisible by 4 Sufficient B) x=16n. Not divisible by 4. Sufficient IMO D”
September 18, 2011
cans posted a reply to TV Networks. in the Critical Reasoning forum
“IMO B conclusion: media is sometimes guided by moral principles and doesn''t do anything for ratings. A)This doesn''t mention anything regarding moral principles or ratings.. B) Even though the ratings will decrease, info was not made public. C) Out of scope. D) This shows the motive of high ...”
September 17, 2011
cans posted a reply to Word problem in the Problem Solving forum
“what I am saying is that we have 2 equations and 3 variables. Thus all the options should fit. Lets take E. 8. it means time taken by B = 16. thus by V = B + 8 = 24 thus 24 = 8 + (24m)/(24+m) -> 2(24+m) = 3m or m=48. This also gives the solution and is correct.”
September 17, 2011
cans posted a reply to Vita-Plus in the Critical Reasoning forum
“D,E) out of scope. capsules containing cellulose are not discussed. C) As initially it didn''t show any effect, it doesn''t strengthen the argument B) correct. This proves that study was unbiased. volunteers were randomly selected. A) maybe those who took more than 2 capsules daily already had ...”
September 17, 2011
cans posted a reply to Exponent Problem in the Problem Solving forum
“2^x - 2^x-2 = 3(2^13) i think the problem is like this : 2^x - 2^(x-2) = 3(2^13) -> 2^x - 2^x/4 = 3(2^13) (as 2^(a-b) can be written as 2^a / 2^b) 4* 2^x - 2^x = 3(2^13)*4 3*2^x = 3(2^13)*(2^2) 2^x = 2^(13+2) = 2^15 thus x=15”
September 17, 2011
cans posted a reply to Word problem in the Problem Solving forum
“B,V,M working together... B = V and M working together. Thus answer is B/2 (Half of time taken by B) B = V-8 and V = 8 + VM/(V+M) = 8+B (which we already know) B = VM/(V+M). (we have 2 equations and 3 variables) I think question needs some correction.”
September 17, 2011
cans started following venmic
September 17, 2011
cans posted a reply to WHO in the Sentence Correction forum
“I don''t agree with venmic. ''The number who is'' is incorrect. we can''t use who for the number. and if we are using ''the number of boys who is going...'' i still think ''is'' is incorrect. Can''t it be: The number of boys going to the cinema has jumped by 20%??”
September 17, 2011
cans posted a reply to pure zoo aquariums in the Critical Reasoning forum
“IMO B”
September 17, 2011
“I think D is correct. probably just means chances are there... Can anyone explain why not??”
September 17, 2011
cans posted a reply to Conclusion argument - Can't figure out the conclusion here in the Critical Reasoning forum
“parasitic behavior is rare which is because they are well hidden....”
September 17, 2011
cans posted a reply to Conclusion argument - Can't figure out the conclusion here in the Critical Reasoning forum
“So what should be the answer according to you??”
September 17, 2011
cans posted a reply to Probability question in the Problem Solving forum
“its not correct. 4 properties, 2 choices = 4!/2! ways of choosing since order doesn''t matter. so 12. it will be 4C2. (chose 2 out of 4) = 6. to get the expression x^2-(by)^2 we can only have choices (x+y and x-y) , (x+5y and x-y) thus 2/6 = 1/3.”
September 17, 2011
cans posted a reply to prime numbers in the Data Sufficiency forum
“M = P^x * T^y M = n* P^2 * T??? B) m is multiple of P^3. then it is also multiple of P^2. Sufficient A) if m is only pt, factors = 1,p,t,m if m=pt^4, factors: 1,p,t,pt,pt^2,t^2,pt^3,t^3,t^4,m = 10 factors (>9). not multiple Thus insufficient. if m=p^4 *t, it will have 10 factors but will be ...”
September 17, 2011
cans posted a reply to Kaplan Ve4rbal Workout Early Comps in the Sentence Correction forum
“faster than ever before possible is present in D also...”
September 17, 2011
cans posted a reply to Philos and aristotle so .. that and so as to in the Sentence Correction forum
“IMO A”
September 17, 2011
cans posted a reply to circus tickets in the Problem Solving forum
“price=p. 220p = 1.1m (m is last month''s revenue) p=m/200 (200)(1.05p) = 210p = 210m/200 = 1.05m this month revenue=1.05m and last month''s=m % less = .05m/1.05m * 100% = 100/21 * IMO C”
September 17, 2011
cans posted a reply to Kaplan Ve4rbal Workout Early Comps in the Sentence Correction forum
“B,C :subject verb disagreement. (computers is plural...) faster than ever before possible is redundant... faster than ever also conveys the same meaning...... IMO E”
September 17, 2011
cans posted a reply to Numbers in the Problem Solving forum
“There was a slight defect with the odometer (which shows the distance travelled) where the digit 9 was missing. Didn''t understand the question..”
September 17, 2011
cans posted a reply to Conclusion argument - Can't figure out the conclusion here in the Critical Reasoning forum
“C says: Size of nesting box is small which is nowhere mentioned in the stimulus. It just says that nesting boxes become crowded because of extra eggs. say normal nest has capacity of 10 eggs, and nesting box has capacity of 11, nesting boxes can become crowded if 5 extra eggs come... D) If ...”
September 17, 2011
cans posted a reply to Male and Female in the Data Sufficiency forum
“no we take only male and female into account. A) 28m + 30f = 2890 m should be multiple of 5 (as everything else is divisible by 10) m=5a. 14a + 3f = 289. also f = 100-5a. 14a + 300 - 15a = 289 a=11, m=55. Sufficient B) f+10+f=100 f=45,m=55 Sufficient IMO D”
September 17, 2011
cans posted a reply to Combination in the Problem Solving forum
“A,B,J,M,V. select 1 to sit for aisle seat: 3C1 =3 case 1: b/v sit in 3rd row: 2C1 (select 1 to send to 3rd row) and arrange the other 3: 3! = 2*6=12 case 2: b/v sit in 1st row only: 2C1 (select one of the other 2 to sit in 3rs row) and as b,v don''t sit next to each other, they sit like B-V or ...”
September 17, 2011
cans posted a reply to Conclusion argument - Can't figure out the conclusion here in the Critical Reasoning forum
“There is no conclusion in the stimulus. question is to find the conclusion.”
September 16, 2011
cans posted a reply to how ?? in the Problem Solving forum
“i think the q is : s/t=64.12 remainder = .12*t t is integer. a) .12*t = 2 not integer. b) .12*t=4 not integer c) .12*t=8 not integer d) .12*t=20 not integer e) .12*t=45 -> t=4500/12 =375 IMO E”
September 16, 2011
cans posted a reply to Friends in the Problem Solving forum
“A ->a, B->b. Combined A*B = c = (ab)/(a+b) A did 3/5 and B 2/5 in 2 hours A did: 2/a in 5 hours A did: 5/a and B: 5/b in next x hours, x/a and x/b Thus (7+x)/a = 3/5 and (5+x)/b = 2/5 also x/a + x/b = 9/20 3 equations, 3 variables....”
September 16, 2011
cans posted a reply to So as Vs So that in the Sentence Correction forum
“IMO D”
September 16, 2011
cans posted a reply to Television in the Critical Reasoning forum
“IMO D Negate it. If child watches less tv, his level will not increase. Thus watching less television won''t help.”
September 16, 2011
cans posted a reply to likelihood that their children will attend college in the Critical Reasoning forum
“Conclusion: if parents in the county wish to increase the likelihood that their children will attend college, they should send them to private rather than public schools Weaken... A) Nowhere it is mentioned that highest score means college education. B) Money issue is out of scope. C) Again ...”
September 16, 2011
cans posted a reply to Did I screw myself over? in the Lounge forum
“good for you.. at gmatclub.com, there are some extra free flash cards. you can check them also. Good Luck :)”
September 16, 2011
cans posted a reply to Need experts help in this question in the Critical Reasoning forum
“b) is out of scope. Argument is: well-funded special interest groups are able to influence these large open referenda.. Nowhere it says that direct elections are effective or not. and legislators are out of scope..”
September 16, 2011
cans posted a reply to OG10 in the Critical Reasoning forum
“I think D is obvious. We are looking at number of deaths in US and overseas and concluding that as numbers don''t differ much, it isn''t much dangerous to be overseas. D) per thousand numbers is same as %. if we see % of deaths in US compared to % of deaths overseas, its pretty clear that it will ...”
September 16, 2011
cans posted a reply to superficial parallelism in the Sentence Correction forum
“look for the meaning. Ken traveled, visited, ate and learned......... he visited site, ate foods and learner cultures when he was traveling around the world...”
September 16, 2011
cans posted a reply to Need experts help in this question in the Critical Reasoning forum
“E) just mentions that decisions tally with well funded special interest. We don''t know whether they are actually influenced. there may exist other reasons for same views/decisions.”
September 16, 2011
cans posted a reply to absolute value question in the Problem Solving forum
“nopes”
September 16, 2011
cans posted a reply to Question from Priceton in the Critical Reasoning forum
“IMO B”
September 16, 2011
cans posted a reply to DS-number in the Data Sufficiency forum
“N-> perfect square?? A) Not square. (perfect square has odd number of distinct factors) Sufficient B) sum of all distinct=even. 3:1,3 (even) 36:1,2,3,6,12,18,36 (even) insufficient IMO A”
September 16, 2011
cans posted a reply to DS Question in the Data Sufficiency forum
“(243)^x* (463)^y = n x+y=7 sufficient. unit digit is 7. x=4 insufficient. y not known. IMO A”
September 16, 2011
cans posted a reply to Nice One in the Data Sufficiency forum
“x^2= 350y = 25*14*y. as x is integer, y is multiple of 14. a) x=4n. -> y has to be multiple of 4. thus y divisible by 18. (y is already multiple of 7) Sufficient b) x^2 or 350y is divisible by 28. 25y is divisible by 2. y is divisible by 2. y=14, is possible, y not divisible by 28. y=56 ...”
September 15, 2011
cans posted a reply to roots in the Problem Solving forum
“sum of the roots = a. product=b. if b is prime number, one root=1 and other=b thus a = b+1. 24=23+1 possible. 29=28+1 nopes 57=56+1 nopes 40=39+1 nopes 92=91+1 nopes IMO A”
September 15, 2011
cans posted a reply to Did I screw myself over? in the Lounge forum
“Hey, If you are good at verbal, practice quant properly. Its not tough and you can take gmat prep test (Thats based on actual test). 550 is not difficult score... You can do it :)”
September 15, 2011
cans posted a reply to Great Stats Problem in the Problem Solving forum
“A:{-9,3,8,10,J} B:{-6,-2,0,5,7,T} if J is negative,R = 3 (Median of A) 3^W is factor of 34. (34 doesn''t have 3 as prime factor) Thus W=0 (1 is factor of 34) Thus as 0 is mode, T=0 IMO B”
September 15, 2011
cans posted a reply to worst case scenario???? in the Problem Solving forum
“21+44+1 = 66. 21 because its possible that first 21 balls are white and thus we can''t get 23. next 44 because in case we get 22 green and 22 blue. still not 23. the next will surely either be green or blue. thus 23 same color..”
September 15, 2011
cans posted a reply to Geomerty in the Problem Solving forum
“let same point = 0,0. B-> (-5,0) and A(5,0) (1 unit means 10 km) C(x,y). x^2 + y^2 = 25 (x+5)^2 + y^2 = 36 -> x^2 + y^2 + 25 + 10x =36 -> x=-1.4 A&C: (x-5)^2 + y^2 -> x^2 + y^2 + 25 - 10x = 50 + 14 = 64..”
September 15, 2011
cans posted a reply to Chords in a circle in the Problem Solving forum
“But don''t they intersect? (They share a common end point)”
September 15, 2011
cans posted a reply to distribute its music in the Problem Solving forum
“yeah i know n is multiple of 10. for 10, we have 5.9, for n we will have (5.9)(n/10) = 0.59n”
September 15, 2011
cans posted a reply to n is increased by 8 in the Problem Solving forum
“n+8 = (-0.5)^3 = -.125 n = -8.125 IMO C”
September 15, 2011
cans posted a reply to angle of a rhombus is 60° in the Problem Solving forum
“Diagonals of rhombus bisect at 90 degree. Thus tan 30 = shorter/longer, or longer/shorter = 1/tan 30 = √3 IMO B”
September 15, 2011
cans posted a reply to distribute its music in the Problem Solving forum
“equipment: 250 10 CD: 5.9 thus 1 cd: .59 for n cd, .59n cost = 250 + .59n IMO B”
September 15, 2011
cans posted a reply to front, side, and bottom in the Problem Solving forum
“a*b=24 b*c=8 a*c=3 (a*b*c)^2 = 24*8*3 volume = a*b*c = root(24*24) = 24 IMO A”
September 15, 2011
cans posted a reply to Chords in a circle in the Problem Solving forum
“IMO A”
September 15, 2011
cans posted a reply to Elementary Grades in the Problem Solving forum
“ratio:16:1 ,total=510. thus 30 teachers and 480 students. kindergarten-> 1/5 = 96 and remainder=4/5 5+6 -> (1/3)(4/5)=4/15 1+2 -> 1/4 let 3=4=x. (1/5 + 1/4 + 4/15) 480 + 2x = 480 -> 2x = 480*17/60 -> x = 68. Thus 96-68 = 28 fewer”
September 15, 2011
cans posted a reply to Elephant in the Sentence Correction forum
“B) has suggested is wrong C) had descended.. wrong D) same as C. A) not parallel... (that... and that should be there)”
September 15, 2011
cans posted a reply to financial officer in the Sentence Correction forum
“B looks fine to me, but A is more concise..”
September 15, 2011
cans posted a reply to a PS from Gmat in the Problem Solving forum
“3 couples and 4 men. atmost 1 couple = 0 couple or 1 couple. = total - 2 couple... total 10C4 - 3C2= 207...”
September 15, 2011
cans posted a reply to OG problem quant 2nd edition in the Data Sufficiency forum
“K={a,b,c,.............} K is set of numbers. rule 1: if x is present, -x is also present. Thus if -1 is in K, we have 1 also. if we have 2, we have -2 also... rule 2: if 2,3 are present: 6 is also present. And now as 2 and 6 are present, 12 should be present and similarly 24 should be present ...”
September 14, 2011
cans posted a reply to Absolute value in the Data Sufficiency forum
“|a| + |b| > |a + b| ? ? b) |a|* b <0. as |a|>=0 always, b<0.. b=-1,a=-2 -> lhs=rhs. b=-1, a=2 -> lhs>ths Insufficient a) a^2>b^2 above 2 cases still apply. Insufficient.. a&b) Insufficient IMO E”
September 14, 2011
cans posted a reply to GMAT Boost Challenge Question #2 in the Problem Solving forum
“Nth term = (-2)^n * a (where a is first term) B) a*[(-2)^3 + (-2)^4 + (-2) ^5 ] = -24. We can find a, and thus 7th term Sufficient A) again we will get one equation in a, which can be solved. Sufficient”
September 14, 2011
cans started following gmatboost
September 14, 2011
cans posted a reply to GMAT Boost Challenge Question #4 in the Problem Solving forum
“the order of demonstrations is fixed. d1,d2,d3. 1st can be given by any one of the 5 officers = 5 ways 2nd -> 5 ways 3rd -> 5 ways Total = 5*5*5 = 125 (this includes the case when one officer gives all 3 demonstrations) Thus 125-5 = 120....”
September 14, 2011
cans posted a reply to Habanero pepper in the Sentence Correction forum
“IMO D a,b -> Subject verb agreement error... (certain spicy food -> plural, makes -> singular) C) ''like'' compares similar things and also ''they'' is ambiguous.. D) Correct.. ''these foods'' is mentioned instead of ''they'' and ''make'' is in agreement with certains picy foods... E) ...”
September 14, 2011
“What''s the problem with C??”
September 14, 2011
cans posted a reply to Historians in the Sentence Correction forum
“This is past tense.... in C, ''and would be'' is wrong as it refers to future prediction..”
September 14, 2011
cans posted a reply to help me with this SC in the Sentence Correction forum
“Japan is not a culture. Its a country. A,B and C are wrong. images are things and ''that'' should be used. IMO D”
September 14, 2011
cans posted a reply to economic recession in the Sentence Correction forum
“causing cutbacks and starting a cycle shows these are parallel and happen simultaneously which is not correct....”
September 14, 2011
cans posted a reply to permutations and combination in the Problem Solving forum
“same: 3+4*4..”
September 14, 2011
cans posted a reply to plz help in the Problem Solving forum
“generally 2 lines either intersect at a point, or they don''t intersect at all (when they are parallel) Thus: to not have a unique solution, lines should be parallel. slope of 1st = -3/4 = slope of 2nd = -k/12 3/4 = k/12 or k=9 IMO B”
September 14, 2011
cans posted a reply to Charcoal from a hearth site in Colorado in the Critical Reasoning forum
“Conclusion: , humans must have come to the Americas more than 18,000 years ago. Premise: glaciers prevented human migration south from the Alaska-Siberia land bridge between 18,000 and 11,000 years ago Premise: Charcoal is known to be 11,200 years old. Cast doubt means weaken... A) both 11,200 ...”
September 14, 2011
cans posted a reply to From 600 to 710 in 32 days in the I just Beat The GMAT! forum
“@bblast: didn''t check ur RC post earlier.. Its really good... Thanks a lot :)) I have booked for 13th Oct . So I have one month to go... Any suggestion on how I should plan this month for Verbal??”
September 14, 2011
cans posted a reply to Highest Investment in the Data Sufficiency forum
“A) no info about w. insufficient B) x = 25% of (w+x+y+z) -> x= (w+y+z)/3 (or x is the average) Insufficient. A&B) x>z>y and x is the average. then w>x (Otherwise x will be highest and not average) Thus w. IMO C”
September 14, 2011
cans posted a reply to WORK & TIME in the Problem Solving forum
“20 men -> 30 days. 1 man 600 days and 15 men 40 days. 20 men can do 1/30 work in a day.. 15 men can do 1/140 work in a day a) 20 men work for 10 days: 1/3 work done. 15 men work for 25 days: 25/40 done. Nopes b) 20 men work for 20 days: 2/3 work done. 15 men work for 15 days: 15/40 done. ...”
September 14, 2011
cans posted a reply to Is abc/def > bc/de in the Data Sufficiency forum
“let bc = x and de=y.. then ax/fy > x/y ???? a) x>y is given. but nothing about a and f. insufficient b) a>f. no info about x and y.. (We can''t cancel them because we don''t know whether x/y is -ve or +ve) Insufficient.. a&b) we don''t know whether x/y >0 (it is possible -1 ...”
September 14, 2011
cans posted a reply to From 600 to 710 in 32 days in the I just Beat The GMAT! forum
“Hi, Congrats on your score.. This much improvement in 32 days is brilliant... I have the same problem in RC.. They are dull and somehow I can''t put myself to read them... What should I do??”
September 14, 2011
cans posted a reply to DS question in the Data Sufficiency forum
“1/x+1/y=6??? xy!=0... a) x=y, if x=y=1/3 possible, otherwise not possible. Insufficient b) (x+y)=2/3. eqn: (x+y)/xy=6 or xy=1/9. Can be possible or not possible. (x=1/6,y=1/2 -> not possible; x=y=1/3 possible) Insufficient a&b) x+y = 2/3 and x=y, thus x=y=1/3. Sufficient IMO C”
September 14, 2011
cans posted a reply to Sentence Correction Question in the Sentence Correction forum
“A) symbolized the possibility of freedom refers to Africa and not ''Blacks return to Africa'' I can''t find any correct answer here......”
September 13, 2011
cans posted a reply to 2 Veritas Problems in the Data Sufficiency forum
“ab<a??? a) a=0. ab=0 and a=0, ab=a. Sufficient. b) b=0, ab=0, we don''t know whether a>0, insufficient IMO A”
September 13, 2011
cans posted a reply to 2 Veritas Problems in the Data Sufficiency forum
“1) a=0??? a) a=a^2. a=0,1 Insufficient b) a = a^3 - a^2 -> a(a^2-a-1)=0. a^2-a-1 is quadratic with discriminant >0, thus it has two roots (irrational) Thus not sufficient. a&b) a=1 doesn''t satisfy b. so only option left is a=0. Sufficient IMO C”
September 13, 2011
“in first, adverb. It modifies richer... in second adjective. It modifies earn........”
September 13, 2011
cans posted a reply to DS: DISTANCE in the Data Sufficiency forum
“A B C is a=-b?? (zero half way between A and B) a) b >0. Insufficient b) if B>0, then A=-B. but if B<0, -B>0 then we will have: A B C -B.. Insufficient a&b) b>0, thus A=-B. Sufficient IMO C”
September 13, 2011
cans posted a reply to Sphere with Cube incribed in the Data Sufficiency forum
“A) vol of cube = 1000 but we don''t know vol of sphere. insufficient B) it means radius of sphere=8. but size of cube unknown. Insufficient a&b) vol of remaining = vol of sphere - col of cube. everything is known. Sufficient IMO C”
September 13, 2011
cans posted a reply to medical care in the Critical Reasoning forum
“D.. Is it valid GMAT problem??”
September 13, 2011
cans posted a reply to Need experts help - OG 12 Diagnostic in the Sentence Correction forum
“Burning, Thinning and "the Training" are not parallel. small scale burning, forest thinning and the training are parallel....”
September 13, 2011
cans posted a reply to Question regarding a MGMAT Question in the Sentence Correction forum
“first of all E, is in passive voice while A is in active voice which is preferred. And also according to me, in E, Corleone is the subject and ''he'' refers to Corleone which is not correct.”
September 13, 2011
cans posted a reply to English poets in the Critical Reasoning forum
“I don''t know if its correct or not but here goes my explanation: Conclusion: Because English poets disregard syllable count and call poem with "haiku feel" a haiku, they respect foreign traditions little. A) syllable count is objective and "haiku feel" is subjective. Because ...”
September 13, 2011
cans posted a reply to MGMAT Question in the Problem Solving forum
“Alternate method: Total ways=21 (=7C2) As we know there are 3 groups (a,b) (c,d) (e,f,g) no of ways they are sibling = either select group (a,b) or select group (c,d) or select any 2 members from group (e,f,g) = 1 + 1 + 3C2 = 5 Prob (siblings)=5/21 prob(not siblings) = 1 - 5/21 = 16/21”
September 13, 2011
cans posted a reply to MGMAT Question in the Problem Solving forum
“7c2 is total number of ways we can select any 2 people. We have total 7 people and we have to select 2 people. There are 3 groups. 2 groups have 2 people each and one group has 3 people. So for people not siblings, they should be from different group. Same group people are siblings. And as we ...”
September 13, 2011
cans posted a reply to D.S -Number System in the Data Sufficiency forum
“p is multiple of q means p=nq where n is an integer. or p/q = n a) p/3q is an integer -> p/q = integer*3 = n (where n is an integer) True b) 3p/7q is an integer. or p/q = 7*integer/3. Now it is possible that integer is not multiple of 3, and thus p/q is not an integer. It is also possible that ...”
September 13, 2011
cans posted a reply to English poets in the Critical Reasoning forum
“IMO A”
September 13, 2011
cans posted a reply to MGMAT Question in the Problem Solving forum
“total 7. 4 people have exactly 1 sibling and 3 people have exactly 2 siblings. let people be a,b,c,d,e,f,g. if a has ''b'' as sibling, then ''b'' will have ''a'' as sibling. similarly ''c'' and ''d'' are siblings and ''e'',''f'',''g'' are siblings. We have 3 groups of siblings. total number of ...”
September 13, 2011
cans posted a reply to probability of buying candy in the Problem Solving forum
“p(b) = 0.3 and p(n)=0.7 exactly4 = exactly 4 buy and 2 not buy.. select 4 persons from 6. 6C4 = 15 prob = 15* (0.3)^4*(0.7)^2 ( 4 buy and 2 not buy)”
September 13, 2011
cans posted a reply to numbers in the Problem Solving forum
“5^2 + 5^4 + 5^6 = a^2 - b^2. 25 + 625 + 15625 = 16275 = a^2 - b^2 a^2 = 651*25 + b^2.. if b=5, a^2 = 25*652. 652 is not square.. if b=10, a^2 = 25*655. not square. b=15, a^2 = 660 -> not square b=20, a^2 = 667 not.. b=25, a^2 = 25*676. (676 is 26^2) Thus IMO E”
September 13, 2011
cans posted a reply to DS: MEDIAN in the Data Sufficiency forum
“76% means 152 <= 80. or 48>80 Thus median <=80 let no. > 70=x. b) then 40/100 * x = 48 or x = 120. Thus 120 numbers >70 and 80 numbers <=70. Still 70 can be a median if around 20 members = 70. Insufficient a)as 60% <=80 it means 40%>80 A and b are same... IMO E”
September 13, 2011
cans posted a reply to Quantitative PS Help in the GMAT Math forum
“2nd: circular table arrangements = (n-1)! (for n people) as n=5, 4! = 24 IMO C”
September 13, 2011
cans posted a reply to Quantitative PS Help in the GMAT Math forum
“1st one: pqs + pus + x = 270 (=360-90) (sum of angles of quadrilateral) a) alone is ob not sufficient and b) alone is also not sufficient a&b) qr=rs thus, rqs = rsq and similarly, tsu=tus. pqs = 180 - rqs (straight line) and pus = 180- tus thus x -tus -rqs = -90. also rqs = rsq and tsu = ...”
September 13, 2011
cans posted a reply to Probability in the Problem Solving forum
“1/5 -> c 1/10 -> v 1/15 -> v and c thus neither v nor c = 1 - 1/5 - 1/10 + 1/15 = 23/30 IMO A”
September 13, 2011
cans posted a reply to distance on the coordinate plane in the Problem Solving forum
“(1,2) and (2,1) -> reflected on y=x. a) A lies on y=x. thus equidistant. Sufficient b) A lies on y=-x. if we take (0,0) -> equidistant, if we take (1,-1), distance from (1,2) = 3 and distance from (2,1) = root(5) <3. Thus farther from (1,2). if we take (-2,2), distance from (2,1) = ...”
September 13, 2011
cans posted a reply to CR Boldfaced Questions in the Critical Reasoning forum
“IMO E”
September 13, 2011
cans posted a reply to DS. TRIANLGE in the Data Sufficiency forum
“p > 2r*pi > 6.28r b) let side be a, then perimeter=3a. 3a> 6.28r?? a>2.09r?? not possible as 2r is diameter and longest side... sufficient a) radius=4. perimeter of circle = 25.12 one side of triangle=8. (max is 8 as its the diameter) max perimeter=24 < 25.12 ...”
September 12, 2011
cans posted a reply to OG range problem in the Data Sufficiency forum
“range = largest number - smallest number r>2???? b) z is smallest. no idea about largest. insufficient a) w-z>2. the largest number =w or >w, the smallest number=z or <z.. thus in any case, range >2 Sufficient. IMO A”
September 12, 2011
cans posted a reply to OG integer problem in the Data Sufficiency forum
“x +ve int. a)root(4x) = 2* root(x) = integer. root(x) = integer/2. (if that integer is odd, x won''t be integer) Thus integer is even and root(x) is integer. Sufficient b) root(3) * root(x) is not integer. x=9, root(x)=3 it holds true. x=5, root(x)=root(5) (not integer) condition holds true. ...”
September 12, 2011
cans posted a reply to ODD/EVEN in the Data Sufficiency forum
“a) ab + cd is odd. thus one is even and other odd. lets say cd is odd, then c,d -> odd. atleast one of a,b is even. c/d is odd... also a/b can be even or odd (4/2, 4/4) thus insufficient b) a/b + c/d = (ad+bc)/bd. as ad+bc is odd, numerator is odd and thus a/b + c/d is odd..... Sufficient ...”
September 12, 2011
cans posted a reply to zoo in the Critical Reasoning forum
“IMO D as zoos grow animals, public can see more exotic animals also if "they are grown"”
September 12, 2011
cans posted a reply to Divisibility Problem in the Problem Solving forum
“As pemdas and Shankar explained, its similar to divisibility by 6 question..”
September 12, 2011
cans posted a reply to SC in the Sentence Correction forum
“IMO E to pay and to profit - parallel. thus only a,e left. E- idiomatic.”
September 12, 2011
cans posted a reply to SC question in the Sentence Correction forum
“can anyone tell why A is wrong?”
September 12, 2011
cans posted a reply to IS X < Y in the Data Sufficiency forum
“X,Y >1 a) x^2 < xy + x. x(x-y)<x. as x>1, x-y<1. insufficient b) xy/(y)(y-1) <1 or x< y-1 x-y < -1. <0 x<y Sufficient IMO B”
September 12, 2011
cans posted a reply to Probability in the Data Sufficiency forum
“r,b,y,g. total ways=4C2 = 6. at least 1 b or 1 g means 6 - no b and no g. = 6 - r and y = 6-1 = 5. Prob = 5/6 IMO C”
September 12, 2011
cans posted a reply to DS. TRIANLGE in the Data Sufficiency forum
“perimeter>16?? A)r=2. thus max side can be 4 (diameter). even with all the three as diameters(not possible), perimeter max=12. Sufficient B)Insufficient. (we can have circle with r=100 and then p>16 is possible) IMO A”
September 12, 2011
cans posted a reply to Divisibility Problem in the Problem Solving forum
“108,114,120,....750 6*18,..... 6*125.. Thus number = 125-18 + 1=108”
September 12, 2011
cans posted a reply to sequence in the Problem Solving forum
“Then its like: S1 = 1/1 - 1/2 s2 = 1/2 - 1/3 s3 = 1/3 - 1/4 . . sn = 1/n - 1/(n+1) thus sum of first n = 1 - 1/(n+1) a) when k>10, k=11 means sum = 1 - 1/12 = 11/12 > 9/10 as k increases, 1/(n+1) decreases and thus sum increases. Thus sufficient b) k<19. at k=11, sum>9/10. ...”
September 12, 2011
cans posted a reply to sequence in the Problem Solving forum
“S1 = 1/1.. s2 = 1/2 - 1/1 s3 = 1/3 - 1/2 . . sn = 1/n - 1/(n-1) i think for n=1, s1 should be 1 and not 1/1 - 1/0 (as 1/0 is not defined) thus sum for n integers: 1/n b) k<19. if n=1, sum=1 > 9/10 and if k=10, sum=1/10 <9/10 Insufficient a) k>10. k=11, 1/11 <9/10... as k ...”
September 12, 2011
cans posted a reply to Critical Reasoning_Boldface Questions in the Critical Reasoning forum
“Powerscore CR bible...”
September 12, 2011
cans posted a reply to Data Sufficiency in the Suggestions and Feedback forum
“IMO E”
September 12, 2011
cans posted a reply to DS: x*y in the Data Sufficiency forum
“x is either 3 or 6. A) let x equals 3 be true. then y not equal 2 is false or it means y=2. thus xy=6. if y does not equal 2 is true, x equals 3 is false or x=6 (x is either 3 or 6 ). x=6 and y is not equal to 2, thus xy not equal to 12. Sufficient B) let x equals 6 be true. then y not equal 4 ...”
September 12, 2011
cans posted a reply to MSc Finance: UK or US? in the Research MBA Programs forum
“Hi, I am also considering finance masters. I can''t help you because I don''t have any idea about institutes. Can we apply with less than 1 year work ex??”
September 11, 2011
cans posted a reply to Not over yet(Q47 V41 720) in the I just Beat The GMAT! forum
“Congrats... 720 is nice score.... although quant can be improved..... Good luck for applications :)”
September 11, 2011
cans posted a reply to MGMAT coordinate square in the Problem Solving forum
“is OA A If yes, area=100 means side=10. thus 4 squares can be drawn in each quadrant with integer vertices...”
September 11, 2011
cans posted a reply to List of 5 unknown numbers - 700+ Q in the Data Sufficiency forum
“Sorry again for wrong explanation. IMO D if smallest is 3. then numbers have to be 3,4,5,6,7. no other possibility.....”
September 11, 2011
cans posted a reply to Question from GMAT prep in the Data Sufficiency forum
“median of 73 means 36 scores less than that and 36 more than that. 50-59 -2 60-69 -10 70-79 -16 total = 28 80-89 -27. total = 55. Thus 37th number is between 80-89 IMO D”
September 11, 2011
cans posted a reply to help needed in the Problem Solving forum
“cylindrical base: circle. area of base = pi* r^2. area of triangle = root(3)/4 * a^2. p(inside base)=1 - 3/4 = 1/4 = [root(3)/4 * a^2] /[pi* r^2] a^2 = pi * r^2 / root(3) Thus we can get a.”
September 11, 2011
cans posted a reply to How many people came in the Data Sufficiency forum
“I made a mistake in A.... it is as you mentioned but when you solve for n, its not an integer. But # of people should be integer. so A can''t be correct....... I think question is wrong......”
September 11, 2011
cans posted a reply to Time,Speed & Distance in the Problem Solving forum
“time taken to meet = 80 min. let A in x hr, then B in x+2... I think some info is missing in this question....”
September 11, 2011
cans posted a reply to How many people came in the Data Sufficiency forum
“n people came. fees = f.. fee received = fn A) (f- f/7500)(n+100) = fn insufficient. B) (f+1.5)(n-100)=fn -> 1.5n -100f -150=0. 3n - 200f - 300 =0 insufficient. combining A,B we have 2 eqn and 2 variable. Thus IMO C”
September 11, 2011
cans posted a reply to List of 5 unknown numbers - 700+ Q in the Data Sufficiency forum
“sum of 5 integers = 25. sum of 3 = 12... thus sum of 2 = 13. b) smallest = 3. if that''s discarded, the other discarded = 10. but all are single digit, thus not possible. but if 3''s not discarded, sum of 2 = 9. Sum of 2 = 13 (4,9) (5,8) (6,7) sum of 2 =9 (1,8) (2,7) (3,6) (4,5) only ...”
September 11, 2011
cans posted a reply to women representative-probability in the Data Sufficiency forum
“total no of ways = 10C2 = 45. Let there be x women, thus p = XC2/45. p>1/2 means XC2/45> 1/2 or (x)(x-1)>45... a) x>5. if x=5, 20>45 false. if x=9, 72>45 true. insufficient b) let men be y. thus YC2/45 < 1/10 or (y)(y-1)<9. y=0,1,2,3 is possible. thus x can be 7,8,9,10. ...”
September 11, 2011
cans posted a reply to Exponents problem in the Problem Solving forum
“as 5 is prime number, power of 5 on lhs and rhs should be same. LHS: -m (5 is raised to power -m) RHS: -35 (5 is raised to power -35) Thus -m=-35 or m=35 IMO D”
September 11, 2011
cans posted a reply to sc 1000 -confusing in the Sentence Correction forum
“IMO c”
September 11, 2011
cans posted a reply to sc 1000 tough one in the Sentence Correction forum
“IMO B”
September 11, 2011
cans posted a reply to sc 1000 tough one in the Sentence Correction forum
“IMO C”
September 11, 2011
cans posted a reply to The diet -sc in the Sentence Correction forum
“IMO E”
September 11, 2011
cans posted a reply to sc 1000 tough one in the Sentence Correction forum
“IMO C”
September 11, 2011
cans posted a reply to Shiprock-Sc in the Sentence Correction forum
“IMO C”
September 11, 2011
cans posted a reply to Judge Bonham -SC in the Sentence Correction forum
“IMO D”
September 11, 2011
cans posted a reply to sc 1000 tough one in the Sentence Correction forum
“IMO B”
September 11, 2011
cans posted a reply to sc 1000 tough one in the Sentence Correction forum
“IMO A”
September 11, 2011
cans posted a reply to sc 1000 more tough in the Sentence Correction forum
“IMO D”
September 11, 2011
cans posted a reply to Critical Reasoning - Doubt in the Suggestions and Feedback forum
“A) number is irrelevant B) Large animals is out of scope / irrelevant C) this will let us know how frequently tranquilizer is given....... D) nothing to do with male rhinoceroses. E) irrelevant to the tranquilizer”
September 11, 2011
cans posted a reply to Sentence Correction in the The 60-Day GMAT Study Guide forum
“IMO A”
September 11, 2011
cans posted a reply to Question - Data Sufficiency in the Suggestions and Feedback forum
“z=x+y. (F/P)x > (F/P)z??? (Is the ratio of full time employees to part time employees greater for division X than it is for Company Z) B) X full Time: > Z full time/2 also X Part Time: < Z part time/2 Thus ratio (F/P)x > (F/P)z...Sufficient A)Y < Z (ratio) Thus X<Z IMO D”
September 11, 2011
cans posted a reply to Confused - DS question in the Suggestions and Feedback forum
“A) is not sufficient. with A, z=-1 is also possible: (-1)^2 = 1.”
September 11, 2011
cans posted a reply to DS. PRIME NO. in the Data Sufficiency forum
“B) as W is a perfect square, it has atleast 3 factors: 1,W, root(w) thus x also has atleast 3 factors and thus is not prime. Sufficient... A)if W = 16, X is not prime, if W=5, its prime. Insufficient IMO B”
September 11, 2011
cans posted a reply to astronauts.. in the Sentence Correction forum
“Performing a risky maneuver that required precision flying is a modifier which modifies astronauts and thus should be placed next to them. A,B,C are wrong retrieved and avoided should be parallel. IMO E”
September 11, 2011
“A) rate comparable to the US..... (Here rate is compared to the US which should instead be compared with the rate of US..)”
September 11, 2011
cans posted a reply to RC - 9 Questions in the Reading Comprehension forum
“acbdeaedc”
September 10, 2011
cans posted a reply to Question in the Sentence Correction forum
“total capacity = 32 gallons. median of 4 means avg of 2nd and 3rd.. thus 2+3 = 20 Thus 1 + 4 = 12. thus max possible of smallest = 2. (largest has to be atleast 10) IMO B”
September 10, 2011
cans posted a reply to Asian American studies in the Sentence Correction forum
“IMO D a,b,c - subject verb agreement (professors is plural so it should be their and not his...) e) awkard”
September 10, 2011
cans posted a reply to A recording system in the Sentence Correction forum
“IMO A”
September 10, 2011
cans posted a reply to sc 1000 in the Sentence Correction forum
“IMO C”
September 10, 2011
cans posted a reply to 710; bblast signing off- Thank you all in the I just Beat The GMAT! forum
“Congrats bblast... 710 is awesome :)”
September 10, 2011
cans posted a reply to Swedish in the Critical Reasoning forum
“C) is not correct because eventually any equipment can be replaced when better technology is available. this doesn''t mean that now he shouldn''t advertise it as safety improvement. a) irrelevant b) he is not advertising the means or process.. just the feature e) if this is true, it should ...”
September 10, 2011
cans posted a reply to Erik and Joe.. in the Problem Solving forum
“let persons by k,e,j. e and j sit together, so put them in a box. Now we have ''k'' and a box. no. of ways to arrange them = 2! Now in between box, we can arrange e,j in 2 ways: (ej,je) thus 21*2 = 4 ways”
September 10, 2011
cans posted a reply to Line Segment in the Problem Solving forum
“P(0,-1) Q(3,2) twice far from P as from Q is: (2:1) x: (2*3 + 1*0)/3 = 2 y: (2*2 + 1*(-1))/3 = 1 IMO B”
September 10, 2011
cans posted a reply to geometry in the Problem Solving forum
“radius = 6. base of abc = 2r and h = 8r/5 (half height to AB = 4r/5) thus area = (1/2)bh = 8* r^2 / 5 = 90 -> r = 5 * 3 /2 = 15/2 area of semicircle = pi* r^2 /2 = (22/7) (225/8) = 11*225 / 28 = 2475/28 around 88 IMO C”
September 9, 2011
cans posted a reply to Suggest another way in the Data Sufficiency forum
“m+t+w+th+f+s+su=90 s >f>every other day. f>11?? a) th=8. remaining 6 = 82. we can take f=10 and arrange others such that total becomes 90 and all conditions are satisfied and same thing can be done by taking f=12. Thus insufficient b) s=38. thus remaining 6 = 52. in remaining 6, f is ...”
September 9, 2011
cans posted a reply to community board in the Data Sufficiency forum
“p<500,000? a)25 members represent first 500,000. and only 23 members are present, p<500,000 Sufficient b)with 51 members, we can find changed population and thus divide by 3 ans determine actual. IMO D”
September 9, 2011
cans posted a reply to Complementary Probability in the Problem Solving forum
“atleast 3 means: exactly 3 + exactly 4 + exactly 5. 3: 5C3*(1/2)^3*(1/2)^2 4: 5C4*(1/2)^4*(1/2) 5: 5C5*(1/2)^5 total = (1/2)^5 * 16 = 1/2 IMO E rrrnn can be arranged in 10 ways: 5!/(3!*2!)”
September 9, 2011
cans posted a reply to Exponent /Power problems Math in the Problem Solving forum
“8^2X3^3X2^4/ 96^2 = 64*27*16 / 96*96 = 3”
September 9, 2011
cans posted a reply to Probability in the Problem Solving forum
“out of 3 times, he speaks truth once. thus prob = 1/3. p(3/reported = 3) = p(3 and reported=3)/p(reported = 3) = (1/6)*(1/3)/(1/3) = 1/6”
September 9, 2011
cans posted a reply to tough Q in the Problem Solving forum
“a,b,c,d - books. 10 ppl only A. total 10 books read. only c&d = 8. total 16 books read. remaining students = 8. remaining books = 30. a person can read max 4. thus 8 ppl can read max 32. if 7 ppl read 4 max, 28 books read. Thus left =2. IMO A”
September 9, 2011
cans posted a reply to Boldface Questions in the Critical Reasoning forum
“have you read powerscore CR bible?”
September 9, 2011
cans posted a reply to Beatrix Potter in the Sentence Correction forum
“IMO C”
September 9, 2011
cans posted a reply to One of the greatest problems in the Sentence Correction forum
“a)one of the greatest problems is remaining empathetic to the needs of patients....... b) one of the greatest problems is to remain empathetic to the needs of patients..... i think b distorts the meaning also.”
September 9, 2011
cans posted a reply to GMAT Destroyer pls come and help me, I stuck at this in the Critical Reasoning forum
“new cars after 1993: less emissions (m just talking about nitrogen dioxide) donia: less emissions donia capital: although new cars proportionally high, insignificant decline in emission. paradox question: a) more cars are made before <1993. but it has been mentioned that proportion of new ...”
September 9, 2011
cans posted a reply to Fed. tax on cigarettes CR question in the Critical Reasoning forum
“conclusion: after tax and volume of sales are dependent. negating a)say during 2009,pretax = 99,in 2010: 100 and in 2011 = 101. due to 1 cent increase in 2010, sales fell only 1%. Thus with 1 cent increase in 2011, they can''t fall 10%. but with tax price in 2011= 109. 9 cents increase can ...”
September 9, 2011
cans posted a reply to Isosceles Triangle in the Problem Solving forum
“which triangle??”
September 8, 2011
cans posted a reply to Quant Problems in the GMAT Math forum
“Can you please post only one question per forum from next time.”
September 8, 2011
cans posted a reply to Quant Problems in the GMAT Math forum
“total = 8. order: ...77,87,90 IMO E”
September 8, 2011
cans posted a reply to Quant Problems in the GMAT Math forum
“<30. 14 even integers (2,...28) 9,27.. 11,13,15,17,19,21,23,25,27,29. that leaves 1,3,5,7 Thus 25. (total 29)”
September 8, 2011
cans posted a reply to question in the GMAT Math forum
“sum can be max 12. prime numbers = 2,3,5,7,11. 11 -> (5,6): 1*2 = 2 7: (1,6),(2,5),(3,4)= 6 5 (1,4)(2,3) - 4 3 (1,2) 2 2 (1,1) 1 ttoal = 15 prob = 15/36 = 5/12 IMO B”
September 8, 2011
cans posted a reply to Question in the GMAT Math forum
“median = 15 and range = 15. a) not possible. if 0 is there, largest number can be 15 but that is median and numbers are distinct. b) 4. largest number can be 19. possible - 4,7,8,9,15,16,17,18,19 IMO B”
September 8, 2011
cans posted a reply to knewton DS in the Data Sufficiency forum
“@bblast: yeah.. 3 months break i guess. :) back for a month and will be gone again. :)”
September 8, 2011
cans posted a reply to Quant Problem in the Data Sufficiency forum
“a) 40 open on both monday and tuesday. (not only on monday) so your reasoning is incorrect”
September 8, 2011
cans posted a reply to Cordinate Geometry in the Data Sufficiency forum
“Correct me if i am wrong. line is tangent at (2,0) means it passes through (2,0) also b) given another point through which line passes. So combining them, we get 2 points which make only 1 line. and thus we can get the slope. So c) sufficient.”
September 8, 2011
cans posted a reply to DS INTEGER in the Data Sufficiency forum
“thanks for that mistake. x should not be 16. but then also c) is sufficient. because a) says that 3x+1 is prime and it means x is even. (which includes 2 also) and with b we can say that 5x+1 is not square when x=2. Thus x=2 is invalid. Thus x is even >2. Thus x is not prime IMO C”
September 8, 2011
cans posted a reply to a data from gmat forum in the Data Sufficiency forum
“a) insufficient. b) c-d = 3 c = 5, d=2. # in between = 2 (3,4) c=5.5,d=2.5. # in between = 3 (3,4,5) insufficient a&b) c=-2.5,d=-5.5. # of integers = -5,-4,-3 (3) d = -2.5, c=.5, # of integers = -2,-1,0 (3) sufficient”
September 8, 2011
cans posted a reply to Green Energy Sector in the Critical Reasoning forum
“States are losing manufacturing jobs and can recover employment opportunities by expanding into green energy sector. a) they already have infrastructure and thus they can start manufacturing green energy products. b) they can take advantage of tax rebates only when they are in green business. but ...”
September 8, 2011
cans posted a reply to SC....confused between two options. in the Sentence Correction forum
“How is OA E? In E, what does this refers to?? (porpoises is mentioned which is plural)”
September 8, 2011
cans posted a reply to Difficult DS from GMAT PREPE in the Data Sufficiency forum
“It is max 2 min question. first of all you should know that sum of angles of triangle = 180. and thus in triangle pqr, qpr + pqr + prq = 180 and thus option A and B are same. Thus answer is either D or E. now we have to find prs - pqr. in triangle prs, rps + prs = 90 and in triangle pqs, pqs ...”
September 8, 2011
cans posted a reply to DS MEDIAN in the Data Sufficiency forum
“a) insufficient. no information about set b median. b) sum set A = sum set B. A = a-2,a-1,a,a+1,a+2 and B = b-3,b-2,b-1,b,b+1,b+2,b+3 5a = 7b. medians are a and b. insufficient. (a=b=0 can be possible) a&b) a=0 and thus b=0 Sufficient”
September 8, 2011
cans posted a reply to What is the best way to solve this problem? in the Problem Solving forum
“d=a*root(2) area = (d^2)/2. thus diff = (21^2 - 19^2)/2 = 40 IMO E”
September 8, 2011
cans posted a reply to Help please!!!!!!!!!!! in the Problem Solving forum
“IMO C y=3x+2. (3x+2)/6 will never be an integer. because 3x can be divisible by 6 when x is even. but 2 can''t be divisible by 6.”
September 8, 2011
cans posted a reply to CR inference quesion in the Critical Reasoning forum
“initially: low air fares and #miles increasing. now: high air fares and #miles increasing. What can be inferred?? (means what must be true) B) This can be the reason for #miles increasing. but we can''t say that it must be the reason. maybe people need to make more frequent trips and they still ...”
September 7, 2011
cans posted a reply to QUANT DS in the Data Sufficiency forum
“a) x-y=27. x=38,y=11 diff = 2. x=41,y=14, diff = 3 insufficient b) x-y = 27 and unit of x - unit of y >3. thus (x,y) unit pairs can be: (9,2), (8,1), (7,0) x=37,y=10. x=47,y=20. diff = 2 always. Sufficient IMO C”
September 7, 2011
cans posted a reply to DS INTEGER in the Data Sufficiency forum
“a) 3x + 1 is prime. also as x is integer, 3x+1 can''t be 2. thus 3x+1 is odd or 3x is even. this x is even. x=2 - prime. x=6, not prime Insufficient b)5x + 1 is perfect square. x=16 (81 is perfect square) x=3 (16 is perfect square) not sufficient a&b) x is even. thus 5x+1 is odd and 5x is ...”
September 7, 2011
cans posted a reply to Arithmatics: HELP AGAIN in the Data Sufficiency forum
“Its not mentioned that DCBA is 4 digit. anyway, 9901 - 1099 = 8802 is one option.”
September 7, 2011
cans posted a reply to PARALLELOGRAM in the Data Sufficiency forum
“IMO C”
September 7, 2011
cans posted a reply to QUANT DS: HELP HELP in the Data Sufficiency forum
“sum of n consecutive integers = 10n n is odd. let first =a, then last = a+(n-1) 2a + n =21.. b) a+n-1=34 -> a+n=35. thus a = -14. Sufficient. a)range=14 a+n-1 -a = 14. n =15. 2a+15=21. a = 3. Sufficient. IMO D”
September 7, 2011
cans posted a reply to QUANT DS in the Data Sufficiency forum
“IMO E”
September 7, 2011
cans posted a reply to Cordinate Geometry in the Data Sufficiency forum
September 7, 2011
cans posted a reply to QUICK QUANT QUESTION... in the Problem Solving forum
“1/t = 5s/(s-t) (s-t)/t = 5s (s/t) = 5s + 1 t = s/(5s+1) IMO A”
September 7, 2011
cans posted a reply to Heavy commitment by an executive in the Sentence Correction forum
“IMO E ones is not a correct word. one eats one''s dinner (notice apostrophe)”
September 7, 2011
cans posted a reply to Arithmatics in the Data Sufficiency forum
“9900 - 99 = 9801”
September 7, 2011
cans posted a reply to Permutations in the GMAT Math forum
“a) 5C2*21C4*6! (select 2 vowels and 4 consonants and arrange them) b) case 1: no repetition: 5C2*21C4*6! case 2: only vowels repeated: 5C1*21C4*(6!/2!) case 3: 2 consonants repeated (bbcd...): 5C2*21C3*(6!/2!) case 4: 3 consonants repeated (bbbc): 5C2*21C2*6!/3! case 5: 4 consonants (bbbb): ...”
September 7, 2011
cans posted a reply to Motorcycle in the Problem Solving forum
“54/12 = 4.5 IMO C”
September 7, 2011
cans posted a reply to Cordinate Geometry in the Data Sufficiency forum
“IMO C”
September 7, 2011
cans posted a reply to Quant Problem in the Data Sufficiency forum
“20% of M open on T. m>t?? b) 30% of t open on m. Thus 20%m = 30%t or we can say m>t. Sufficient a) 20% of m = 40 -> m = 200.. on t? we don''t know. insufficient IMO B”
September 7, 2011
cans posted a reply to P&C in the Data Sufficiency forum
“consonants = 4 arrange them = 24 ways. vowels = 3. arrange them = 6 ways. also 5 spaces in consonants. pick any 3 . 5C3 24*6*10 =1440”
September 7, 2011
cans posted a reply to HELP, HELP HELP, difficult math in the Data Sufficiency forum
“3^x + 1 is divisible by 10 when 3^x ends with 9 (unit place will add to 9+1 =10 then and thus divisible by 10) b) x>4 x=5 -> 3^5 = 243.. not true. x = 6 -> 3^6 ends with 9. thus divisible. Insufficient a) x=3n+2. or x= 2,5,8,.. 3^5 not true. 3^2 true.. Thus insufficient. a&b) ...”
September 7, 2011
cans posted a reply to Combinatorics in the Problem Solving forum
“c,a,d,h are to be in order c->a->d->h. c,a,d,h can be arranged in 24 ways (4!) out of these 4! we need only 1. Thus 8!/4! = 1680 IMO C”
September 7, 2011
cans posted a reply to fairly simple DS in the Data Sufficiency forum
“a) 40b = 56s 300b = 56*300/40 sufficient b)sufficient IMO D”
September 6, 2011
cans posted a reply to knewton DS in the Data Sufficiency forum
“let #blue shirts = n thus n+4n=75 Sufficient n+45+n=75 Sufficient. IMO D”
September 6, 2011
cans posted a reply to marbles in the Problem Solving forum
“b=2 and 0=5. 56000 = 7*2^6*5^3 thus orange=3. blue=6 thus 9,7, 5,3 possible. IMO A”
September 6, 2011
cans posted a reply to p & l in the Problem Solving forum
“20% 96kg means cost should be 80/kg 60/kg means 20/kg, 75 means 5 and 100 means -20. if we take 4:5:6 -> 80+25-120 = -something... 1:2:3 -> 20+10-60 nopes 2:3:4 -> 40+15-80. nopes. IMO D”
September 6, 2011
cans posted a reply to Quant Problem in the GMAT Math forum
“8 machines 9 days. 1 machine 72 days. to complete work in 6 days, 12 machines IMO E”
September 6, 2011
cans posted a reply to Quant Problem in the GMAT Math forum
“40 = 1*40, 2*20, 4*10, 5*8, only 4*10 or 5*8 combinations are possible. so minimum can''t be 6. (we require atleast 4 or 5) IMO E”
September 6, 2011
cans posted a reply to great depression in the Sentence Correction forum
“By confronting - By improving. Launching should be parallel to creating,opening, suspending.. IMO E”
September 6, 2011
cans posted a reply to Company X conducted a taste test to determine in the Critical Reasoning forum
“IMO C”
September 6, 2011
cans posted a reply to engineering feats in the Sentence Correction forum
“IMO E Subject - Verb Agreement”
September 6, 2011
cans posted a reply to 100 or 110 in the Problem Solving forum
“if only first name - 10 If both first name and middle name - 10*9 (=90) total 100 IMO B”
September 6, 2011
cans posted a reply to Veritas Probability in the Problem Solving forum
“What''s the slot method??”
September 6, 2011
cans posted a reply to Recently, many critics of the U.S. government in the Critical Reasoning forum
“IMO E D) Official relies on health statistics but he never mentioned them when asked. E) almost complete survey of the nations of the world. (Almost means around 90%) Which supports his claim.”
September 6, 2011
cans posted a reply to CR : Tellersville nuclear in the Critical Reasoning forum
“IMO B Scope Shift. Problems in children but tested on rodents. B) toxins have different effect on rodents and children. Thus if water supply affects rodents, we can''t say it affects children also.”
September 6, 2011
cans posted a reply to IS powerscore CR bible enough? in the Critical Reasoning forum
“Powerscore bible is enough for concepts. But more practice is required..”
September 5, 2011
cans posted a reply to Knewton CR - good one in the Critical Reasoning forum
“I don''t know if my answer is correct or not. But here goes my explanation: A) It tells us about the present use of stover which is not at all related to the future use (Extraction of Ethanol). So irrelevant. B) This is good as $3 includes everything. C) Irrelevant. (We don''t know whether ...” September 5, 2011 cans posted a reply to Plugging In in the GMAT Math forum “10 ppl, rent = r. rent per person = r/10. Now only (10-x) ppl remain. Thus rent per eprson = r/(10-x) thus extra rent paid by each person = r/(10-x) - r/10. (That''s why we subtract coz we have been asked how much more does each person pays)” September 5, 2011 cans posted a reply to question in the GMAT Math forum “let 3x use only B. then 2x use both. thus only A + only B + Both + None = 350 -> 85+3x+2x+115 = 350 -> x=30 or 3x=90 IMO D” September 5, 2011 cans posted a reply to direction in the GMAT Math forum “40*root2” September 5, 2011 cans posted a reply to math in the GMAT Math forum “251/11 = 22 soaps + 9 scraps. from 22 soaps, we get 22 scraps. from these 22, we will make 2 more soaps and get 2 more scraps. now we have total of 11 scraps and thus 1 soap and 1 scrap. Total = 22 + 2 +1 = 25” September 5, 2011 cans posted a reply to alchol and water- mixtures in the Problem Solving forum “initially 50% alcohol solution. (let 100 ml). we replace x ml with 25% soln. Thus total alcohol = 50(100-x) + 25x = 5000 - 25x = 3000 (resulting is 30%) thus x = 80” September 5, 2011 cans posted a reply to data in the Data Sufficiency forum “½ n + 13 = 0 => n=-26. a) largest =13. but maybe all others are -26 or none of them is -26. insufficient b) maybe numbers are -5,5,-5,-5 and so on. or maybe numbers are -26,26,-26,26... insufficient a&b) maybe numbers are 13,-13,13,-13.... or maybe numbers are ...” September 5, 2011 cans posted a reply to confused.. in the Critical Reasoning forum “Are these correct options? IMO A” September 5, 2011 cans posted a reply to Coordinate Geo in the Data Sufficiency forum “y=px+q. Line reflected on y=x will have slope 1/p. Thus m=1/p means true. p+2 = 1/p -> possible also and not possible also. 3p = 1/p -> insufficient. both combined -> p=1. Thus parallel. Sufficient IMO C” September 5, 2011 cans posted a reply to tough questions in the GMAT Math forum “No more than 7 spaces from 49 means no. lies between 42 and 56 (including these). Thus possible no. = 15. Now if original no. on 49 - 100% less than 35 or more than 63= 0% 35-48 and 50-63 = 50% (total numbers = 28) = 14% thus final = 15% IMO D” September 5, 2011 cans posted a reply to Knewton CR - good one in the Critical Reasoning forum “OA E” September 5, 2011 cans posted a reply to Inequality in the Data Sufficiency forum “C” September 5, 2011 cans posted a reply to sets in the GMAT Math forum “10.. correct?” September 5, 2011 cans posted a reply to Nine months after the county banned jet in the Sentence Correction forum “past tense, so violates is wrong. IMO D” July 23, 2011 cans posted a reply to Sum of positive integers x and y in the Data Sufficiency forum “x+y=77 a) x= y+1. get one x and one y and thus xy is unique Sufficient b) x and y have same 10 digits. so it must be 3. (if 2, then max sum can be 58 and if 4, then min sum can be 80) as sum is 77, it means the sum of unit places is 17. and that''s possible only with 8 and 9 (9+8=17) thus no.s ...” July 23, 2011 cans posted a reply to Set problem in the GMAT Math forum “atleast one team = 17 on both = 7 thus only on M + only on C = 10 (=17-7) M=2C. To Find: only M M = only M + both & C = only C + both -> M = only M + 7 & C = only 7 + 7 only M + 7 = 2* (only C) + 14 -> only M = 2*(only C) + 7 = 10 - (only C) => only C = 1 and thus only M = ...” July 23, 2011 cans posted a reply to Exposure in the Critical Reasoning forum “known: no. of children sent for treatment has increased. conclusion: either more exposure to chemicals or more sensitive to chemicals. a)no. of school nurses is irrelevant b) allergies to other substances is irrelevant c) conclusion is that children are more exposed or more sensitive but maybe ...” July 23, 2011 cans posted a reply to positive integers less than 10,000 in the Problem Solving forum “# of one digit numbers = 1 (only 5 satisfies) # of 2 digit numbers = 5 (14,41,23,32,50) # of 3 digit numbers = 15(122 (*3) ,131 (*3),410 (*4),230 (*4),500 (*1)) # of 4 digit numbers =35 (5000 (*1), 4100 (*6), 3110 (*9), 3200 (*6), 2210(*9), 2111(*4)) OA C” July 23, 2011 cans posted a reply to Clarification in the Data Sufficiency forum “14 is even and also divisible by 7. So answer is C” July 23, 2011 cans posted a reply to idiom- assumed in the Sentence Correction forum “i think both are correct” June 17, 2011 cans posted a reply to Rate of work in the Data Sufficiency forum “a&b = 6/5 hours a&c = 2/3 hours b&c = 2 hours (A&b)&(a&c)&(b&c) can finish in 1/ ( 1/(6/5) + (1/(2/3) + 1/2 ) = 1/ ( 5/6 + 3/2 + 1/2)) = 6/17 thus a&b&c can do in 3/17 hours” June 15, 2011 cans posted a reply to bank's difficulties in the Sentence Correction forum “IMO E[/spoiler]” June 14, 2011 cans posted a reply to probability - gmat prep in the Problem Solving forum “(x+y)(x-y) and (x+5y)(x-5y) are 2 such pairs total=4C2=6 thus prob=2/6=1/3 IMO B” June 14, 2011 cans posted a reply to Solve for x in the Problem Solving forum “let 2^x=t 256t^2 -32t + 1 =0 (16t -1)^2 = 0 t=1/16 x=-4” June 14, 2011 cans posted a reply to Powers in the Problem Solving forum “let 5^(5x)=a then numerator 5a - (a/5) + 24 = 24(a+5)/5 denominator = 2.4a + 12 = 12(a+5)/5 thus numerator/denominator = 2” June 14, 2011 cans posted a reply to Prime number factors in the Problem Solving forum “x,y,z prime numbers. xy has 4 factors: 1,x,y,xy xyz has 8 factors: 1,x,y,z,xy,yz,xz,xyz (x^2)y 6 has 1,x,x^2,y,xy,(x^2)y IMO E” June 14, 2011 cans posted a reply to Divisibility in the Problem Solving forum “287X30Y4 x+y is positive multiple of 6, thus A is eliminated (0 is not positive) also 12+y - (12+x) = y-x is multiple of 11 only E satisfies. IMO E” June 14, 2011 cans posted a reply to Arithmatic, Algebra in the Problem Solving forum “n=2m+1 n^2 = 4m^2 + 4m + 1 n=1;remainder=1 n=3;remainder=1 n=5;remainder=1 IMO A” June 14, 2011 cans posted a reply to Percentage in the Problem Solving forum “560-atleast 10 years (A) let y retirs. remaining = 560-y total remaining = (800-y) 3(800-y)/5 = 560-y 2y = 560*5 - 2400 y = 280*5 - 1200 = 200” June 14, 2011 cans posted a reply to what is the effective way of solving this? in the Problem Solving forum “x=40+42+....+60 y=11 x=(11/2)(100)=550 x+y=561” June 14, 2011 cans posted a reply to sum of even numbers in the Problem Solving forum “7550” June 14, 2011 cans posted a reply to range in the Problem Solving forum “sum of 5 numbers = 55*5 3rd number is 55. a+b+d+e = 55*4 e=20+3a to maximize (e-a) or (20+2a) d=55;b=a 2a+e = 55*3 = 165 5a=145 -> a=29 range = 20+58=78” June 14, 2011 cans posted a reply to OG 12 Problem 208 in the Problem Solving forum “IMO A” June 14, 2011 cans posted a reply to Num Prop in the Problem Solving forum “a)insufficient b)x-y=2 insufficient a&b) x=2*m*y (m is any integer) x=2+y -> 2*m*y = 2+y it means y is even. y=2,m=1 IMO c” June 14, 2011 cans posted a reply to percentage in the Problem Solving forum “1.15x=207 (for 15 people) x=20700/115 = 4140/23 price for 1 person= 4140/(23*15) = 828/69 = 12.00 IMO B” June 14, 2011 cans posted a reply to PS in the Problem Solving forum “82% of total=138 total=138*100/82 = 6900/41 = 168. something thus remaining when 124 was filled = 168-124 = 44 IMO E” June 14, 2011 cans posted a reply to Probability Question in the Problem Solving forum “total 12W,10M to select: 10W,8M select those particular 2 men and 2 women. Remaining: 10W,8M to select:8W,6M no. of ways = 10C8*8C6 = 10*9*8*7/4 =1260 IMO E” June 14, 2011 cans posted a reply to og math # 130 in the Problem Solving forum “x-12, y-15, z-18 y&z together = (1/(1/15 + 1/18)) = 90/11 thus ratio = 12:(90/11) = 22/15 IMO D” June 14, 2011 cans posted a reply to i doubt here in the Problem Solving forum “A=5;C=2 to find: cost per ticket = A” June 14, 2011 cans posted a reply to Grocery...!!! in the Sentence Correction forum “IMO D” June 14, 2011 cans posted a reply to Recursive Exponents in the Problem Solving forum “according to me, both are wrong 2^(2)^3 is same as 2^2^3. (we start from the brackets, but only 2 is in the bracket, so we don''t know whether 2^2 is calculated first or 2^3. brackets should be like 2^(2^3) (then we will solve 2^3 first)” June 14, 2011 cans posted a reply to Data Suff in the Data Sufficiency forum “n = kv (v is face value, n is no. of shares and k is constant) v=m/b (m is another constant) n=40 v=40/k a) m=9*11=99 this helps in finding m and not k. insufficient b)n=km/b -> km=400 insufficient a&b) k=400/99 thus v=40/(400/99) = 9.9 Sufficient IMO C” June 13, 2011 cans posted a reply to Median in the Data Sufficiency forum “sum(a)=sum(b) n(a)<n(b)?? a)med(a)>med(b) insufficient a:{0} med=sum=0 b:{-3,-2,-2,7) med=-2 and sum=0 a:{-4,6,3) b:{5} sum is 5. but n(a)>n(b) b)avg(a)*n(a) = avg(b)*n(b) avg(A) > avg(b) if avg > 0, then n(A)<n(b) if avg <0, n(a)>n(b) insufficient a&b) ...” June 13, 2011 cans posted a reply to Number properties in the Problem Solving forum “134 will leave the same remainder when divided by 215,167 and 135 from 135 to 215, remainders will be different ans 134” June 12, 2011 cans posted a reply to There are hopeful signs in the Sentence Correction forum “in e) than is used again (more than is already present)” June 12, 2011 cans posted a reply to An international group of more than 2,000 in the Sentence Correction forum “group is singular, thus projects should be used. a,b,c eliminated for 1.8 ,6.3 between-and should be used. IMO E” June 12, 2011 cans posted a reply to whose equity?? in the Critical Reasoning forum “IMO A” June 12, 2011 cans posted a reply to Causality weaken... in the Critical Reasoning forum “IMO D a)irrelevant b)strengthens the argument C)supports d)as info was disappearing before the use of anti collision device, anti collison device is not responsible e)irrelevant.” June 12, 2011 cans posted a reply to boldface question in the Critical Reasoning forum “IMI D” June 12, 2011 cans posted a reply to Weaken in the Critical Reasoning forum “conclusion: florida economy will decline a)irrelevant (whether people moved greater distance or smaller distance, we are not concerned) b)out of scope c)suppose 10 years back, 100% people moved to florida. and people moving=100) thus to years back, no. of people moved=100 now it says 97% ...” June 12, 2011 cans posted a reply to Good problem- Exponents in the Problem Solving forum “12^n is divisor of 3176793 12 is even number, and 3176793 is odd thus 12^n should be 1 (and thus n=0) n^12 - 12^n = -1” June 12, 2011 cans posted a reply to Venn Diagram in the GMAT Math forum “total 50 18 none thus 32 atleast 1. 20H,15C,11F,7HC,4CF,5HF exactly2 = 7+4+5 - 3*(exactly3) = 16-3*(exactly 3) 32 = 20 + 15+11 - 7 - 4 -5 + 2*(exactly 3) exactly 3=1 thus exactly 2 = 16-3=13” June 11, 2011 cans posted a reply to Need Help in the Critical Reasoning forum “IMO E” June 11, 2011 cans posted a reply to Found it weird-options too close in the Critical Reasoning forum “IMO D” June 11, 2011 cans posted a reply to Need Helip in the Critical Reasoning forum “Hey can you post the question instead of just mentioning the question number.” June 11, 2011 cans posted a reply to Quadratic in the GMAT Math forum “x = -5 + ( 45 +4k - k^2 )0.5 >0 35 + 4k - k^2 >0 or k^2 - 4k - 35 <0 Do you have options??” June 11, 2011 cans posted a reply to numbers : from GMAT prep in the Data Sufficiency forum “a)y>0 thus 3y>0 also -2x>3y>0 thus x<0 Sufficient b)2x+3y<0 y<-2x/3 5y<-10x/3 2x+5y-20<-4x/3-20 4x/3 + 20 <0 x<-15 Sufficient IMO D” June 11, 2011 cans posted a reply to og 12 Q ds in the Data Sufficiency forum “in 97, 100 rent in 98, 100 + x in 99,(100-y)(100+x)/100 thus we need to find (100-y)(100+x)/100 > 100 or 100x - 100y -xy>0 100(x-y)>xy?? x>y insufficient b)xy<100(x-y) Sufficient IMo B” June 11, 2011 cans posted a reply to question on CR timing in the GMAT Strategy forum “If some questions are convoluted, i think you should make an educated guess and move forward instead of wasting time..” June 11, 2011 cans posted a reply to PROBLEM SOLVING in the Problem Solving forum “m=14, n=9 m-n=5 rermainder=5 IMO E[spoiler]” June 11, 2011 cans posted a reply to Permutaion in the Problem Solving forum “P(A)=1/2 p(B)=3/4 p(C)=3/5 p(one of A,B,C) = p(A & not B * not C) + p(B & not A * not C) + p(C & not B * not A) = (1/2)(1/4)(2/5) + (3/4)(1/2)(2/5) + (3/5)(1/4)(1/2) =11/40” June 11, 2011 cans posted a reply to Permutaion in the Problem Solving forum “REACTION. No of consonants (C=) = 4 No. of vowels (V) = 4 select 3 vowels = 4C3 =4 select 2 consonants = 4C2 = 6 arrange (such that consonants remain together) = 4!*2! = 48 total = 4*6*48 = 24*48 = 1152 IMO D” June 11, 2011 cans posted a reply to GMAT PREP? in the Problem Solving forum “75=a^2 + b^2 + c^2 75=25 + 49 + 1 = 5^2 + 7^2 + 1^2 a+B+c = 5+7+1 = 13” June 11, 2011 cans posted a reply to inequalities doubt in the Problem Solving forum “0<r<1<s<2 rs<1? let r=0.5 and s=1.5 rs=.75 let r=0.99 and s=1.99 rs=1.9701” June 11, 2011 cans posted a reply to mean median concept explain please :) in the Problem Solving forum “mean=6 s.d. = d n=100 (no. of elements) to decrease the s.d. of new set, the elements must be added close to the mean) e)6&6 will keep mean same as 6 and also thus standard deviation will decrease. IMO E” June 11, 2011 cans posted a reply to lines..... in the Data Sufficiency forum “A(1,1) B(1,-1) let slope of line K=k and slope of M=m for them to be perpendicular, k*m=-1 also K passes through A thus 1=k+c1 -> K: y=kx + (1-k) M passes through B, -1=m+c2 -> M: y=mx + (-1-m) a)K and M intersect at (1,-1) Thus K also passes through B or K:x=1 (slope is infinity) no ...” June 11, 2011 cans posted a reply to At a certain company in the Data Sufficiency forum “let total=100 one year or more work ex = W degrees = D 20 = W & not D x=D + not W ?? a)65=D & 45=W thus W and D = 45-20=25 D & not W = 65-25 = 40 Sufficient b)15= not W and not D 45=W 100=15+45 + (x) x=40 sufficient IMO D” June 10, 2011 cans posted a reply to speed/time in the Data Sufficiency forum “OA E” June 10, 2011 cans posted a reply to MGMAT Problem (Advanced Quant) in the Data Sufficiency forum “to find whether 1/a > a/(b^4 +3) or 1/a - a/(b^4 +3) >0 or (b^4 + 3 - a^2)/a >0 or a(b^4 - a^2 + 3) >0 a) a^2 = b^2 a(a^4 - a^2 + 3) >0 (a^4 - a^2 + 3) this is always greater than 0 as D>0 thus a>0 ?? insufficient b)a^2 = b^4 -> a>0??? insufficient a&b) a^2 = ...” June 10, 2011 cans posted a reply to Divisibility & Primes - GCF (Tricky) in the Data Sufficiency forum “b)a=3b b is the GCD. if b=6, GCD=6 and if b=12;GCD=12 Insufficient a)a=2b+6 b=6k (where k is an integer) a=6(2k+1) k and (2k+1) have G.C.D of 1 Thus a,b GCD = 6 IMO A” June 10, 2011 cans posted a reply to Venn diagram question in the Problem Solving forum “let total=100 80=C ; 10% of 80 = 8 both t*c 10 neither t nor c... a) only coffee = 80-8 = 72 (=coffee - both tea& coffee) b) only tea = 100-80-10 = 10 c) tea = 10+8 = 18 (=only tea + t&c)” June 10, 2011 cans posted a reply to mensuration !! in the Problem Solving forum “let squares be of dimension 1*1 and a be the side. Thus number of squares = a*a no. of squares on a diagonal =a no. of squares on other = a But they intersect at a square (i.e. one square is shared by both) thus 2a-1=85 a=43 a^2 = 1849” June 10, 2011 cans posted a reply to gears in the Problem Solving forum “P=1/6 Q=2/3 let x seconds 2x/3 = x/6 + 6 x=12 IMO D” June 10, 2011 cans posted a reply to Number of Stamps in the Data Sufficiency forum “let$0.15 stamps = x and \$.29 stamps =y to find x a).15x + .29y = 4.4 insufficient (one equation two variables) b)x=y insufficient. (no other information) a&b) .15x + .29x = 4.4 ->x=10 Sufficient IMO C”
June 10, 2011