How do you find the greatest common factor of 40 and 72?

Answer 1

62

2 and 31






72


2 and 36


2 and 18


2 and 9


3 and 3






The only common factor shared by these numbers is 2

Answer 2

The factors of 72 are:

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

The factors of 96 are:

1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 96

The common factors are:

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

The Greatest Common Factor:

GCF = 24

Answer 3

72

36,2

18,2,2

9,2,2,2

3,3,2,2,2

Answer 4

Factor them.

2 x 3 x 3 x 3 = 54

2 x 2 x 2 x 3 x 3 = 72

Select the common factors.

2 x 3 x 3 = 18, the GCF.

Answer 5

72

36,2

18,2,2

9,2,2,2

3,3,2,2,2

84

42,2

21,2,2

7,3,2,2

2 x 2 x 3 = 12, the GCF

Answer 6

8x9=72

9x8=72

72 divided by 8=9

72 divided by 9= 8

Answer 7

Factor them.

2 x 2 x 2 x 5 = 40

2 x 2 x 2 x 3 x 3 = 72

Select the common factors.

2 x 2 x 2 = 8, the GCF

Answer 8

Factor them.

2 x 2 x 3 = 12

2 x 3 x 5 = 30

2 x 2 x 2 x 3 x 3 = 72

Select the common factors.

2 x 3 = 6, the GCF

Answer 9

GCF of 18 and 72 is 18