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

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

Front

What are factors of a number?

Back

Factors are integers that can be multiplied together to produce that number.

Front

Find the GCF of 28 and 49.

Back

7

Front

Find the GCF of 16 and 40.

Back

8

Front

Find the GCF of 32 and 40.

Back

8

Front

What are the factors of 25?

Back

1, 5, 25

Front

Find the GCF of 15 and 36.

Back

3

Front

What is the relationship between GCF and LCM (Least Common Multiple)?

Back

The GCF of two numbers multiplied by their LCM equals the product of the two numbers.

Front

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

Back

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