Greatest Common Factor

Front

What is the Greatest Common Factor (GCF)?

Back

The GCF is the largest positive integer that divides two or more numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

To find the GCF, list the factors of each number and identify the largest factor that appears in both lists.

Front

What are factors?

Back

Factors are numbers that can be multiplied together to get another number.

Front

What is the GCF of 24 and 30?

Back

6

Front

What is the GCF of 14 and 22?

Back

2

Front

What is the GCF of 21 and 28?

Back

7

Front

What is the GCF of 18 and 24?

Back

6

Front

What is the GCF of 9 and 15?

Back

3

Front

Can the GCF of two numbers be greater than either number?

Back

No, the GCF cannot be greater than the smallest number.

Front

What is the GCF of prime numbers?

Back

The GCF of two distinct prime numbers is always 1.