What is the greatest common factor of 80 and 100?

Answer 1

A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that both numbers have in common.

One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.

The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80.

The factors of 100 are 1, 2, 4, 5, 10, 20, 25, 50, and 100.

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

Answer 2

The GCF is 20.

Answer 3

GCF(100, 80) = 20

Answer 4

The greatest common factor is 20.