BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Is x > y? (1) sqrt x > y (2) x^3 > y

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Master | Next Rank: 500 Posts
Posts: 131
Joined: Wed Nov 14, 2012 2:01 pm
Thanked: 39 times
Followed by:2 members

by puneetkhurana2000 » Fri Dec 14, 2012 12:48 am
Statement 1) sqrt x > y ..In GMAT you can safely assume that only real numbers are there, so x must be positive.

Case 1) sqrt 16 > 3 , so 16 > 3 Yes
Case 2) sqrt 1/4 > 1/3 , so 1/4 > 1/3 No

Not Sufficient!!!

Statement 2) x^3 > y

Case 1) 2^3 > 1 , so 2 > 1 Yes
Case 2) (-1/2)^3 > -1/4, so -1/2 > -1/4 No

Not Sufficient!!!

Together we have x is positive and as x^3 > y, we must have x > y.

Answer C
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 298
Joined: Sun Jun 03, 2012 6:42 am
Location: New delhi
Thanked: 10 times
Followed by:7 members
GMAT Score:590

by varun289 » Fri Dec 14, 2012 12:58 am
hi khurana , is any other way more easier ? HIt and trial is least preferred
Top
Master | Next Rank: 500 Posts
Posts: 131
Joined: Wed Nov 14, 2012 2:01 pm
Thanked: 39 times
Followed by:2 members

by puneetkhurana2000 » Fri Dec 14, 2012 1:08 am
Sorry Varun, can't think of any other way. You need to ask Experts.
Top
User avatar
GMAT Instructor
Posts: 15539
Joined: Tue May 25, 2010 12:04 pm
Location: New York, NY
Thanked: 13060 times
Followed by:1906 members
GMAT Score:790

by GMATGuruNY » Fri Dec 14, 2012 4:31 am
Check my post here:

https://www.beatthegmat.com/inequality-t147683.html
Private tutor exclusively for the GMAT and GRE, with over 20 years of experience.
Followed here and elsewhere by over 1900 test-takers.
I have worked with students based in the US, Australia, Taiwan, China, Tajikistan, Kuwait, Saudi Arabia -- a long list of countries.
My students have been admitted to HBS, CBS, Tuck, Yale, Stern, Fuqua -- a long list of top programs.

As a tutor, I don't simply teach you how I would approach problems.
I unlock the best way for YOU to solve problems.

For more information, please email me (Mitch Hunt) at [email protected].
Student Review #1
Student Review #2
Student Review #3
Top
Post new topic Post Reply
• Page 1 of 1