Question

why 2220 is not a perfect square number .

Answer 1

because it is ending with odd no of zero

Answer 2

BECAUSE Remember, the square of a number is that number times itself. The perfect squares are the squares of the whole numbers: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100 … Here are the square roots of all the perfect squares from 1 to 100.