Math questions from any Manhattan Prep GMAT Computer Adaptive Test.
CHAPPARFELLOW
Students
 
Posts: 1
Joined: Wed Dec 31, 1969 8:00 pm
 

Question for Manhattan CAT

by CHAPPARFELLOW Thu Sep 15, 2011 8:17 pm

Found this question on one of the mock exams.

Is x·|y| > y2?

(1) x > y
(2) y > 0

The correct answer is given as 'D' (both statements are sufficient)

If you take x = 2 and y = 1, then you get x - |y| = Y^2.
For all other valuse of x and y, such that x > y and y>0, we see that y^2 is greater..

Based on this, shouldnt that answer be E? What am I missing?
jnelson0612
ManhattanGMAT Staff
 
Posts: 2664
Joined: Fri Feb 05, 2010 10:57 am
 

Re: Question for Manhattan CAT

by jnelson0612 Sat Oct 29, 2011 11:39 pm

CHAPPARFELLOW Wrote:Found this question on one of the mock exams.

Is x·|y| > y2?

(1) x > y
(2) y > 0

The correct answer is given as 'D' (both statements are sufficient)

If you take x = 2 and y = 1, then you get x - |y| = Y^2.
For all other valuse of x and y, such that x > y and y>0, we see that y^2 is greater..

Based on this, shouldnt that answer be E? What am I missing?


Question: does the test question also say that xy is not equal to zero? I think that is hugely important here and if you can confirm that I can answer your question.
Jamie Nelson
ManhattanGMAT Instructor