Multiplying By 2S And 5S

Front 1

1x2

Back 1

2

Front 2

2x2

Back 2

4

Front 3

2x3

Back 3

6

Front 4

2x4

Back 4

8

Front 5

2x5

Back 5

10

Front 6

2x6

Back 6

12

Front 7

2x7

Back 7

14

Front 8

2x8

Back 8

16

Front 9

2x9

Back 9

18

Front 10

2x10

Back 10

20

Front 11

5x1

Back 11

5

Front 12

5x2

Back 12

10

Front 13

5x3

Back 13

15

Front 14

5x4

Back 14

20

Front 15

5x5

Back 15

25

Front 16

5x6

Back 16

30

Front 17

5x7

Back 17

35

Front 18

5x8

Back 18

40

Front 19

5x9

Back 19

45

Front 20

5x10

Back 20

50