2 x 7 =
4
2 x 3 =
2
6
16
12
2 x 8 =
2 x 10 =
10
2 x 4 =
8
2 x 9 =
2 x 2 =
2 x 1 =
20
18
2 x 6 =
2 x 5 =
14
