2's
6
what is 2x3 or 3x3 or 6x1 or 1x6
9
What is 3x3
10
what is 2x5 or 5x2 or 10x1 or 1x10
15
what is 3x5 or 5x3
18
What is 9x2 or 2x9
21
what is 3x7 or 7x3
20
what is 2x10 or 10x2
30
what is 3x10 or 10x3
24
What is 2x12 or 12x2
36
what is 3x12 or 12x3