Question

What is the greatest common factor (GCF) of 40 and 56?

Answer 1

8

Explanation:

Factors of 40: 1 2 4 5 8 10 20 40

Factors of 56: 1 2 4 8 14 28 56

Common factors: 1 2 4 8

Greatest common factor: 8

Answer 2

8

Explanation:

Prime factorization

40 = 2 x 2 x 2 x 5

56 = 2 x 2 x 2 x 7 common factor 2 x 2 x 2 = 8