What is the greatest common factor of 78 and 195?

Answer 1

The GCF of 78 and 195 is 39

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 78 are 1, 2, 3, 6, 13, 26, 39, and 78.

The factors of 195 are 1, 3, 5, 13, 15, 39, 65, and 195.

The common factors are 1, 3, 13, and 39. Therefore, the greatest common factor is 39.

Answer 2

GCF of 78 and 195 is 39.