x<y. Is x<0?
1) x^2>y^2
2) x ^ 3> y ^ 3
123) Is x<0?
This topic has expert replies
 ballubalraj
 Senior  Next Rank: 100 Posts
 Posts: 66
 Joined: 15 Dec 2009
 Location: Bangalore
 Thanked: 9 times
 GMAT Score:730
Stmt 1: If x < y, then x^2 > y^2 can be true only if x is negative; sufficient
Stmt 2: If x < y,then x^3 > y^3 can be true only if x = 0; sufficient
Ans D.
Note: As no information is mentioned about x and y, I assumed that zero is an acceptable values for x.
Any expert comments on this?
Stmt 2: If x < y,then x^3 > y^3 can be true only if x = 0; sufficient
Ans D.
Note: As no information is mentioned about x and y, I assumed that zero is an acceptable values for x.
Any expert comments on this?

 Master  Next Rank: 500 Posts
 Posts: 265
 Joined: 28 Dec 2009
 Thanked: 26 times
 Followed by:2 members
 GMAT Score:760
1  For any positive x and y. There is no x and y combination where x^2 > y^2 and x < y are both satisfied. If x is negative and y positive we can have both conditions met. If x is negative and y is also negative, y has to be greater than x for both conditions to hold. Thus, 1 is sufficient, as x<0 is always the case.
2  For x^3 > y^3, means x > y, but the question says x<y. Thus there is no solution.
Hence, my bet is A
OA please .......?
2  For x^3 > y^3, means x > y, but the question says x<y. Thus there is no solution.
Hence, my bet is A
OA please .......?
 ballubalraj
 Senior  Next Rank: 100 Posts
 Posts: 66
 Joined: 15 Dec 2009
 Location: Bangalore
 Thanked: 9 times
 GMAT Score:730