common trap...

Expert replies

roybudhaditya: Junior | Next Rank: 30 Posts; Posts: 13; Joined: Sat Jul 14, 2007 4:44 am

by roybudhaditya » Fri Oct 05, 2007 11:40 am

If X>Y^2>Z^4,,which of the following statements could be true?

1--X>Y>Z.
2--Z>Y>X.
3-X>Z>Y.

a--I only.
b-1 & 2 only.
c-1 & 3 only.
d-2 & 3 only.
e-1 ,2 and 3 only.

any thought?

Like this post

Source: Beat The GMAT — Problem Solving | Fri Oct 05, 2007 11:40 am

Suyog: Master | Next Rank: 500 Posts; Posts: 315; Joined: Thu Aug 17, 2006 10:43 pm; Thanked: 23 times

by Suyog » Fri Oct 05, 2007 1:29 pm

lets take 1st case:

x > y > z
this is simple
Assume z = 2, y = 5, and x =26
26 > 25 > 4
This cond is TRUE

now for 2 and 3, we know that the square of positive or negative even number is always positive and cube of negative number is negative, which is not the case here.

So for the 3rd Case.
assume x = 5, y = -2 and z = -1
5 > 4 > 1
This cond is also TRUE

Case 2 dont satisfy the equation for diff values.

Ans B

Like this post

nidhanoor: Newbie | Next Rank: 10 Posts; Posts: 4; Joined: Thu Sep 20, 2007 12:34 am

by nidhanoor » Fri Oct 05, 2007 2:06 pm

case 2 hold true in this case

x = 0.5 y =0.6 z=0.7
y^2 = 0.36 z^4 = 0.2401

here x > y^2 > z^4

but z>y>x

So E

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review