Number Properties MGMAT Question Bank - If x is not equal ..

[rohansingal]

My question regards the Number Properties Question Bank from MGMAT. The specific problem is #19.

If x is not equal to y and if , what is the value of y cubed?

(1) x = y squared

(2) x cubed = 8


The answer given is D, but I am not able to understand this - I get 2 solutions for y and therefore 2 solutions for y cubed so my answer was E. Can someone please explain?

Thanks,
Rohan

[Ben Ku]

My question regards the Number Properties Question Bank from MGMAT. The specific problem is #19.

If x is not equal to y and if , what is the value of y cubed?

(1) x = y squared

(2) x cubed = 8


The answer given is D, but I am not able to understand this - I get 2 solutions for y and therefore 2 solutions for y cubed so my answer was E. Can someone please explain?

Thanks,
Rohan

The question was transcribed incorrectly.

If x is not equal to y and if sqrt(x) = y, what is the value of y^3?
(1) x = y^x
(2) x cubed = 8

To rephrase the question, let's simplify the information in the question: sqrt(x) = y, so x = y^2. We know that both x and y must be positive. Also, if x is not equal to y, then x and y cannot be 1.

Try to solve it now.