Greatest Common Factors

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (GCF) is the largest number that divides two or more numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

1. List the factors of each number. 2. Identify the common factors. 3. Choose the largest common factor.

Front

What are the factors of 12?

Back

1, 2, 3, 4, 6, 12

Front

What are the factors of 20?

Back

1, 2, 4, 5, 10, 20

Front

What is the GCF of 12 and 20?

Back

4

Front

What are the factors of 25?

Back

1, 5, 25

Front

What is the GCF of 16 and 24?

Back

8

Front

What is the GCF of 32 and 40?

Back

8

Front

List the factors of 28.

Back

1, 2, 4, 7, 14, 28

Front

List the factors of 49.

Back

1, 7, 49