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Q: Which list shows all the factor pairs of 72?

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1 and A

(56,1)(28,2)(14,4)(8,7)

1 and 28, 2 and 14, 4 and 7.

This one: 60,1 30,2 20,3 15,4 12,5 10,6

(22,1)(11,2)

This is the list:64 = 1 x 6464 = 2 x 3264 = 4 x 1664 = 8 x 8

(16,1)(8,2)(4,4)

1,24/2,12/3,8/4,6

(1, 62) (2, 31)

The factor pairs of 50 are: 1 x 50 2 x 25 5 x 10

The factor pairs of 18 are (1 x 18), (2 x 9), (3 x 6)

A way to show factor pairs in a list of all the factors of a number. A factor rainbow can be used to check whether a list of factors is correct.

All numbers have factors. It is possible to list them as pairs. The factors of 12 are 1, 2, 3, 4, 6 and 12. The factor pairs of 12 are (12,1)(6,2)(4,3)

4 and 5, 1 and 20, 2 and 10

1 and 20 2 and 10 4 and 5

it is 1 and 20, 10 and 2, 5 and 4

(1, 81) (3, 27) (9, 9)

(1, 68) (2, 34) (4, 17)

(1, 63) (3, 21) (7, 9)

The factor pairs are 1•41

1 and 64, 2 and 32, 4 and 16, 8 and 8

42 = 1 x 42 42 = 2 x 21 42 = 3 x 14 42 = 6 x 7

1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.

The factor pairs of 20 are: 20,1 / 10,2 / 5,4

The factor pairs of 20 are: 20,1 / 10,2 / 5,4