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

Find the GCF of 9 and 18.

Back

9

Front

Find the GCF of 7 and 14.

Back

7

Front

Find the GCF of 55 and 22.

Back

11

Front

Find the GCF of 20 and 30.

Back

10

Front

Find the GCF of 10 and 15.

Back

5

Front

How do you find the GCF of two numbers?

Back

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 relationship between GCF and multiples?

Back

The GCF is the largest factor common to the multiples of the given numbers.

Front

Can the GCF of two prime numbers be greater than 1?

Back

No, the GCF of two prime numbers is always 1.