What is the square of 1?
1
What is the square of 2?
4
What is the square of 3?
9
What is the square of 4?
16
What is the square of 5?
25
What is the square of 6?
36
What is the square of 7?
49
What is the square of 8?
64
What is the square of 9?
81
What is the square of 10?
100
What is the square of 11?
121
What is the square of 12?
144
What is the square of 13?
169
What is the square of 14?
196
What is the square of 15?
225
What is the square of 16?
256
What is the square of 17?
289
What is the square of 18?
324
What is the square of 19?
361
What is the square of 20?
400