Question

A whole number whose square root is an integer

Answer 1

The possible integer square root are 0,1,2,3 and 4

Answer 2

These are also called "Perfect Squares", and if you're asking what I think you're asking, the first 20 perfect squares are 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196, 225, 256, 289, 324, 361 and 400.

Explanation: