DS Question

Is x > y?

(1) x^0.5 >y

(2) x^3>y

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topgun tagged this post with: GMAT Question of the Day Read 3 articles by topgun

1. nishant says:

   March 27, 2008 at 10:23 am

   for the first one i think the answer is
   Statement 1 is sufficient to ansewr the question but not 2

   Second question , i dont think i quiet understand this question..

   |x||x| = 3x-2 is this what they mean?
2. Venkat says:

   March 29, 2008 at 4:38 pm

   i have one doubt
   if x is negative, what will be x^0.5 ?
   whether positive or negative??
3. sumanth toom says:

   March 31, 2008 at 11:46 am

   Ans C.
   From one.
   assume, x = 0.16 and y = 0.3 . Here, x y.
   x = 4 and y = 1. Here, x > y, and also x^ 0.5 = 2 > y.
   So (1) is not enough to answer.
   From 2.
   Assume,
   x = 4 and y = 1. Here x > y and also x ^ 3 = 64 > y.
   x = 2 and y = 3. Here x y.
   So (2) alone not enough to answer.

   But both together,
   x = 0.16 and y = 0.3. Here x
4. kv says:

   April 7, 2008 at 6:17 pm

   FRM 1st
5. SD says:

   April 24, 2008 at 12:20 pm

   C
6. shilpa says:

   August 7, 2008 at 11:39 pm

   A
7. amma4u says:

   March 9, 2010 at 11:48 pm

   Is x > y?

   (1) x^0.5 >y = this can be written as root of x. x=0.0036 and y=0.0025 OR x=0.025 & y=0.1…cannot determine

   (2) x^3>y = this helps to say x is an integer

   therefore, using both yes x>y.
8. Davidov says:

   March 10, 2010 at 2:21 am

   statement 1 is not sufficient ( consider the cases 1/4 ^ 1/2 > 1/6 but 1/4 1 as well as 5>1 )
   statement 2 is not sufficient ( ( -1/2 ) ^ 3 = -1/8 > -1/6 yet -1/2 -126 -> -5>-126 )
   Statements 1&2 fixes the odd cases and thus the answer is C
9. Kofi DL says:

   March 10, 2010 at 10:07 pm

   Statement 1 alone is necessary and sufficient, but Statement 2 alone is not
10. dp says:

    March 11, 2010 at 10:12 pm

    option c
11. aryan says:

    March 23, 2010 at 9:20 pm

    E