GMAT Data Sufficiency (DS) | Re: If f(n)=4^n-3^n and n is a positive integer
harshdeep12 wrote:If f(n)=4^n-3^n and n is a positive integer, is b – a at least four times the value of f(n)?(1) a = 2 and n= 3(2) a=3^n+1 and b=4^n+1This is a copy of the following OG question:...
View ArticleGMAT Problem Solving (PS) | Re: If n is the sum of the first 40 positive...
Smokeybear00 wrote:If n is the sum of the first 40 positive integers, what is the greatest prime factor of n?A. 29B. 37C. 41D. 17E. 19 Another useful formula:1 + 2 + 3 + 4 + 5 + . . . .+ k =...
View ArticleGMAT Club Tests | Re: M32-05
This can be solved most easily with a visualization. Create a circle with ten slots. Sit Bill at one randomly. There are now nine slots left. Two are exactly adjacent to Bill. The probability that Ann...
View ArticleGMAT Problem Solving (PS) | Re: A factory has 500 workers, 15 percent of whom...
Hello from the GMAT Club BumpBot!Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think...
View ArticleIntegrated Reasoning (IR) | Re: effect of voters previously stated preference...
2/ Zeta is the answer, but not THETA. Here is how: just look at the most left and the right left number for AGAINST. For zeta, it is 0.7 against and 0.55 against => probability is 0.385 (=0.7 x...
View ArticleGMAT Problem Solving (PS) | Re: If m = 9/25, w = 15/32, and m + w+ c = 1,...
m = 9/25 = 0.36 w = 15/32 = 0.4 On substituting C = 0.24 c , m , w on increasing order .
View ArticleGMAT Problem Solving (PS) | Re: Bob bikes to school every day at a steady...
Whatever wrote:Bob bikes to school every day at a steady rate of x miles per hour. On a particular day, Bob had a flat tire exactly halfway to school. He immediately started walking to school at a...
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GMAT Problem Solving (PS) | Re: In the figure above, equilateral triangle ABC...
Attached is a visual that should help.Attachments Screen Shot 2017-06-08 at 4.31.56 PM.png [ 225.94 KiB | Viewed 12 times ]
View ArticleGMAT Problem Solving (PS) | Re: Two consultants can type up a report in 12.5...
manalq8 wrote:Two consultants can type up a report in 12.5 hours and edit it in 7.5 hours. If Mary needs 30 hours to type the report and Jim needs 12 hours to edit it alone, how many hours will it...
View ArticleGMAT Problem Solving (PS) | Re: In the expression above, a, b, and c are...
GMATinsight wrote:(a/b)/cIn the expression above, a, b, and c are different numbers and each is one of the numbers 3, 4, or 7. What is the least possible value of the expression?(A) 21/4(B) 3/28(C)...
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GMAT Problem Solving (PS) | Re: In the arithmetic sequence t1, t2, t3, ...,...
Attached is a visual that should help.Attachments Screen Shot 2017-06-08 at 4.33.09 PM.png [ 108.8 KiB | Viewed 25 times ]
View ArticleGMAT Problem Solving (PS) | Re: A number when divided successively by 4 and 5...
Bunuel wrote:A number when divided successively by 4 and 5 leaves remainders 1 and 4 respectively. What will be the remainder when this number is divided by 20?(A) 0(B) 3(C) 4(D) 9(E) 17 We need to...
View ArticleGMAT Problem Solving (PS) | Re: A truck travelling at 70 MPH uses 30% more...
theperfectgentleman wrote:A truck travelling at 70 MPH uses 30% more gasoline to travel a certain distance than at 50 MPH. If the truck can travel 19.5 miles on a litre of gasoline at 50 MPH, how far...
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GMAT Data Sufficiency (DS) | Re: If it took Carlos 1/2 hour to cycle from his...
Attached is a visual that should help.Attachments Screen Shot 2017-06-08 at 4.32.44 PM.png [ 220.7 KiB | Viewed 14 times ]
View ArticleGMAT Problem Solving (PS) | Re: Which of the following is equivalent to...
GMATinsight wrote:Which of the following is equivalent to \(\frac{(2x+4)}{[2x^2+8x+8]}\) for all values of x for which both expressions are defined?A) 1/(2x^2+6)B) 1/(9x+2)C) 2/(x+6)D) 1/(x+4)E)...
View ArticleGMAT Problem Solving (PS) | Re: From a group of three boys and four girls, a...
rxs0005 wrote:From a group of three boys and four girls, a line of children from left to right is to be selected to salute the flag. If the line must have three boys and two girls, how many different...
View ArticleGMAT Problem Solving (PS) | Re: A can complete a project in 20 days and B can...
154238 wrote:A can complete a project in 20 days and B can complete the same project in 30 days. If A and B start working on the project together and A quits 10 days before the project is completed,...
View ArticleGMAT Quantitative Section | Re: CANT solve word problems. need alternative...
iliavko wrote:Hi everyone.I posted about this many times. I cant solve word problems. I read it and have no clue of where to start. I am bad at math numbers aren't my talent at all math is very tough...
View ArticleGMAT Problem Solving (PS) | Re: A carpenter worked alone for 1 day on a job...
kspice wrote:A carpenter worked alone for 1 day on a job that would take him 6 more days to finish. He and another carpenter completed the job in 4 more days. How many days would it have taken the...
View ArticleGMAT Problem Solving (PS) | Re: If 12 men and 16 women can do a piece of work...
smcgrath12 wrote:If 12 men and 16 women can do a piece of work in 5 days and 13 men and 24 women can do it in 4 days, how long will 7 men and 10 women take to do it?(A) 4.2 days(B) 6.8 days(C) 8.3...
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