Perfect Squares
1^2= 1
2^2= 4
3^2= 9
4^2= 16
5^2= 25
6^2= 36
7^2= 49
8^2= 64
9^2= 81
10^2=100
11^2=121
12^2=144
13^2=169
Any numbers after this----use your calculator!