What is the greatest common factor of 40 and 60 and 80?

Answer 1

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

Factors of 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80.

Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.

GCF (40, 80, 60) = 20

Answer 2

The GCF of 40, 60, and 80 is: 20

20 x 2 = 40; 20 x 3 = 60; 20 x 4 = 80

Answer 3

The GCF is 20.