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Finding Patterns in the Multiplication Table

1

2

3

4

5

6

78

9

Consider the highlighted products.

1

1

2

3

4

567

8

9

The common factor is 12

224

6

8

10

12

14

16

18

3 3

69

12

15

18

21

24

27

44

8

12

16

20

24

28

32

36

5

5

10

15

20

25

30

35

40

45

6

6

12

18

24

30

36

42

48

54

7

7

14

21

28

35

42

49

56

63

8

8

16

24

32

40

48

56

64

72

99

18

27

36

45

54

63

72.

81