sam has 55 stamps in his collection. how many more stamps does he need to make a square number

1 answer

Squares:

2 * 2 = 4
3 * 3 = 9
4 * 4 = 16
5 * 5 = 25
6 * 6 = 36
7 * 7 = ?
8 * 8 = ?
9 * 9 = ?