Greatest Common Factor - Super Teacher Worksheets printable pdf download

Greatest Common Factor - Super Teacher Worksheets

Name: ____________________________________

Greatest Common Factor

When you find all the factors of two or more numbers, and you find some factors are

the same ("common"), the largest of those common factors is the Greatest Common

Factor (GCF).

What are the factors of 12?

1, 2, 3, 4, 6, and 12

What are the factors of 20?

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

Which are the common factors?

1, 2, and 4

What is the GCF?

1. Find the GCF of 8 and 12.

List the factors of 8.

__________________

List the factors of 12. __________________

List the common factors. __________________

What is the GCF?

__________________

2. Find the GCF of 15 and 20.

List the factors of 15.

__________________

List the factors of 20. __________________

List the common factors. __________________

What is the GCF?

___________________

3. Find the GCF of 21 and 35.

List the factors of 21.

__________________

List the factors of 35. __________________

List the common factors. __________________

What is the GCF?

___________________

4. Find the GCF of 6 and 18.

List the factors of 6.

__________________

List the factors of 18. __________________

List the common factors. __________________

What is the GCF?

___________________

Super Teacher Worksheets -

Greatest Common Factor - Super Teacher Worksheets