Square Numbers

Any number that has a factor that is multiplied by itself, is a square number. The product is the whole number.

1x1= 1
2x2= 4
3x3 = 9
4x4 = 16
5x5 = 25
6x6 = 36
7x7 = 49
8x8 = 64
9x9 = 81
and so on.