giantSwan wrote:

I'm still missing something...can you explain in detail how you can up with 2,5, and 10

and

-2,2, and 5?

Actually my solution was written in a hurry, and was incomplete. Here is a more comprehensive solution.

Statement (1) ==> (x^3) * (y^4) = 2000, x is an integer

x can be ANY positive integer. You can set any value of x, and there is an equivalent value of y that will result in an equation value of 2000.

Statement (2) ==> (x^3) * (y^4) = 2000, y is an integer

y can be ANY non-zero integer. You can set any value of y, and there is an equivalent value of x that will result in an equation value of 2000.

Statements (1) & (2) ==> 2000 = (5^3) * (2^4)

You would presume from this breakdown that x=5, and y=2. However, y can be negative (y^4 is always positive). Hence the solution is one of the following:

x=5, y=2; or x=5, y=-2

Insufficient, hence answer is (E)

_________________

My GMAT debrief