Exponent sat question?

Question

If x is a positive integer less than 50, for how many values of x is
x^2 / √ x

an integer?

Answer 1

7 is the answer.
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Reason:
x^2 / √ x = x^(3/2), x ≠ 0
To get an integer result of x^2 / √ x, x must be a perfect square. Therefore, x = 1^2, 2^2, 3^2, ..., 7^2 are qualified solutions.

Answer 2

It would be for the perfect squares less than 50.

x = 1, 4, 9, 16, 25, 36, 49

There are seven values of x.