If x^(1/2)/y = n, what is the value of x?

Question

If  \frac{\sqrt{x}}{y} = n , what is the value of x?

(1) yn = 10

(2) y = 40 and n = 1/4

CounterSniper · Answer

(1) yn = 10
n=  \frac{10}{y} 
 \frac{10}{y}=\frac{\sqrt{x}}{y} 
this will give us x
sufficient

(2) y = 40 and n = 1/4
sufficient

D

Rebirth · Answer

This is mod function there are two values+100 &-100 for X should the answer be E

Bunuel · Answer

This is an OG question and the official answer is D. x cannot be negative because it's under the square root. Even roots, such as the square root, is NOT defined for negative numbers on the GMAT.

kitipriyanka · Answer

Rebirth  : we would be squaring 10 and square of a number is always positive. So answer is 100 in both cases.

Posted from my mobile device

Kinshook · Answer

If  \frac{\sqrt{x}}{y} = n , what is the value of x?

(1) yn = 10
 yn = 10 = \sqrt{x} 
x = 100
SUFFICIENT

(2) y = 40 and n = 1/4
 yn = 10 = \sqrt{x} 
x = 100
SUFFICIENT

IMO D

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If x^(1/2)/y = n, what is the value of x?

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