Question

What qualifies a number as a "perfect square"? List some examples.

Answer 1

A perfect squares is a number whose square root is a natural number . For example 81 , 16 have square roots 9 and 4 respectively. Thus these are perfect squares. However we have no natural number for root of 82. Thus 82 is not a perfect square. Its root will be in decimals

Answer 2

A number that is the product of a whole number multiplied by itself.

Explanation:

4, 9, 16, 25 are all perfect squares because 2x2=4, 3x3=9, 4x4=16, 5x5=25