What are the common factors of 40 and72?

Answer 1

The factors of 40 are:

1, 2, 4, 5, 8, 10, 20, 40

The factors of 72 are:

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

The common factors are:

1, 2, 4, 8

Answer 2

The factors of 24 are: 1, 2, 3, 4, 6, 8, 12, 24

The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40

The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

The common factors are: 1, 2, 4, 8

Answer 3

The factors of 40 are: 1, 2, 4, 5, 8, 10, 20, 40

The factors of 72 are: 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

The common factors are: 1, 2, 4, 8

Answer 4

A single number cannot have a common factor.

Answer 5

Factors of:

32: 2, 4, 8, 16

42: 2, 3, 6, 7, 14, 21

72: 2, 3, 6, 8, 9, 12, 24, 36

Therefore

the common factor of 32, 42, and 72 is 2.

Answer 6

1, 2, 4 and 8

Answer 7

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

Answer 8

The common factors are: 1, 2, 4, 8.