what are the perfect squares
2 X 2=4, 3 X 3=9, 4 X 4=16, 5 X 5=25.......etc.The products of 4, 9, 16, 25 are perfect squares.
1^2 = 1
2^2 = 4
3^2 = 9
4^2 = 16
etc.
[They are just the squares of the first N positive integers]