What is the greatest common factor of 20 and 70?

Answer 1

Answer: 10

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 20 are 1, 2, 4, 5, 10, and 20.

The factors of 70 are 1, 2, 5, 7, 10, 14, 35, and 70.

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

Answer 2

Greatest common factor of 70 and 20 is 10.

Answer 3

The GCF is 10.

Answer 4

The answer is 10.