Factoring and Multiples

What is the greatest common factor of 60 and 80?

Answer

Wiki User
10/18/2016

The GCF of 60 and 80 is 20

Definition: 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 the numbers have in common.

Method:

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

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

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

Wiki User
10/15/2016

GCF(60, 80) = 20.