Question

Why 15 is not a perfect square? ​

Answer 1

Answer:

Is 15 a perfect square number? 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. Here, the square root of 15 is about 3.873. Thus, the square root of 15 is not an integer, and therefore 15 is not a square number.