Question

give reason why 257 is not a perfect square

Answer 1

Answer:

a number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. ... Thus, the square root of 257 is not an integer, and therefore 257 is not a square number.

Answer 2

because it's decimal expansion is non terminating and non repeating
16.0312195

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