x^3>y?

kulksnikhil · Posted: Mon Nov 27, 2006 7:01 am Post subject: x^3>y?

64. Is x^3>y?

1) Root x >y
2) x>y

My choice is E is it correct?

gmat_enthus · Posted: Mon Nov 27, 2006 2:43 pm Post subject:

E looks good.

krishnamurthyu · Posted: Tue Sep 16, 2008 3:52 am Post subject:

Since no information on value of X and Y. X,Y = { Real Number, i.e -Root n,-n,-m/n,0,m/n,Root n,n }
is X^3 > Y

1.Root (X) > Y
When X and Y are Positive Integer +n , X^3 > Y == True
X is m/n then
if X=1/4 , Y= 1/8
Root (X) = 1/2 > 1/8 > Y
But X^3 = (1/4)^3 < Y Hence False

2. X > Y
again the same
When X and Y are Positive Integer +n , X^3 > Y == True
X is m/n then
if X=1/4 , Y= 1/8
But X^3 = (1/4)^3 < Y Hence False

3. (1) and (2) X > Y and Root(X) > Y
if ( X,Y are Positive Integer then True)
If ( X,Y are Rationale No, i.e m/n then maybe false)

Ans.E