What is the greatest common factor of 60 and 40?

Answer 1

The GCF of 40 and 60 is 20

Additional Details

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

The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.

The common factors are 1, 2, 4, 5, 10, and 20. Therefore, 20 is the greatest common factor.

The greatest common factor can also be determined from the prime factors.

The prime factors of 40 are 2, 2, 2, and 5.

The prime factors of 60 are 2, 2, 3, and 5.

The prime factors they have in common are 2, 2, and 5, so the greatest common factor is 2 x 2 x 5 = 20.

Answer 2

The greatest common factor of 60 and 40 is 20

Answer 3

The greatest common factor of 40 and 60 is 20.

20 x 2 = 40

20 x 3 = 60

Answer 4

The greatest COMMON factor is 20.

Answer 5

20

Answer 6

28