Forum: GMAT Math

given that y>0 and y(y+1) > y(y-4), solve for the possible values of y. y(y+1) > y(y-4) if i were to cancel out y from both sides, it would result in a different answer. what rule am i volating? y(y+1) - y(y-4)> 0 ans: y>0

Country Amount Recycled, Amount not recycled a - 16,700 - 142,800 b - 8,800 - 48,000 c - 13,000 - 51,400 d - 3,900 - 20,300 e - 3,300 - 16,200 Which country had the lowest ratio of waste material disposed of to waste material recycled each year? Ok, I know that I could brute force this...

Has anyone purchased the tests from GMAT Club website? Are they any good? Someone recommended GMATClub Challenge Sets..I believe this and Club Test are the same? Pls advise. Thank you.

I am having issues with DS, mainly with arithmetic problems. Please suggest me something with which I can strengthen my arithmetic.

I have a hard time with rate problems, work efficiency and ratios. Can anyone suggest a website that has these problems available? I would like to practice them in large quantities instead of just sporadically in OG11 and Kaplan. Any suggestions would be great and your help is much appreciated....

Q21: k, n, 12, 6, 17 What is the value of n in the list above? (1) k < n (2) The median of the numbers in the list is 10. A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C....

In survey of 248 people, 156 are married, 70 are self-employed, and 25 percent of those who are married are self emplyed. If a person is to be randomly selcted from those surveyed, what is the probablity that the person selected will be self-employed and NOT married? A. 1/8 B. 4/31 C. 117/248...

I need a good GMAT math books that reviews all the math concepts tested on the GMAT. What book should I purchase?

Here is the link with tricky Math questions. I think it is useful. mathquiz

Please delete

Please delete.

Q14: Six cards numbered from 1 to 6 are placed in an empty bowl. First one card is drawn and then put back into the bowl; then a second card is drawn. If the cards are drawn at random and if the sum of the numbers on the cards is 8, what is the probability that one of the two cards drawn is...

If a and b are positive integers such that a – b and ba are both even integers, which of the following must be an odd integer? A. a/2 B. b/2 C. (a+b)/2 D. (a+2)/2 E. (b+2)/2 According to sets OA :: D

When the integer n is divided by 17, the quotient is x and the remainder is 5. When n is divided by 23, the quotient is y and the remainder is 14. Which of the following is true? a) 23x + 17y =19 b) 17x –23y = 9 c) 17x +23y =19 d) 14x + 5y = 6 e) 5x – 14y = -6 Thanks

Q32: If x > 0, is x^2 < x ? (1) 0.1 < x < 0.4 (2) x^3 < x^2 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE...

If x-y>10, is x-y>x+y 1> x=8 2> x=-20 If two of four expressions x+y, x+5y, x-y, 5x-y are chosen at random, what is the probability that their product will be of the form x2-(by)2, where b is an integer? (1/6) Is the integer n odd? 1> n is divisibl by 3 2> 2n is divisible by twice as...

Hi everyone, I was doing GMAT Prep Test 1 the other day and came across this question which I haven't been able to solve since. Hoping someone can help shed some light, thanks much! ******* If n and y are positive integers and 450y=n^3, which of the following must be an integer? I y/(3...

Hello all, I am new to the forum but am amazed and also appreciate the generosity of the individuals who offer help on the GMAT here. Many thanks. I wish my knowledge of GMAT skills was greater and I could add some stuff! Question: I've read that any fraction (after simplification)...

Hi there, would appreciate any help! 1) To furnish a room in a model home, an interior decorator is to select 2 chairs and 2 tables from a collection of chairs and tables in a warehouse that are all different from each other. if there are 5 chairs in the warehouse and if 150 different...

x/|x| < x. Which must be true? x > 1 x> -1 |x| < 1 |X| = 1 |x|^2 > 1