Question

I'm really confused on how to help my daughter with this question what three factors were used to make this Game Product board 4, 6,9, 14,? and 49

Answer 1

you can divide all of these numbers using only 2, 3 and 7

Answer 2

4 = 2*2
6 = 2*3
9 = 3*3
14 = 2*7
49 = 7*7

Answer 3

But how do I fiqure out the ?

Answer 4

the only one missing is 21, 3*7

Answer 5

Thanks.......I have another one it has four factors 9,15,18, ?, 21, ?, 30,35,?,36,42,49