Mastering the Greatest Common Factor (GCF)

Front

What is the Greatest Common Factor (GCF)?

Back

The 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

Find the GCF of 81 and 27.

Back

27

Front

Find the GCF of 36 and 60.

Back

12

Front

Find the GCF of 14 and 49.

Back

7

Front

Find the GCF of 100 and 150.

Back

50

Front

Find the GCF of 20 and 25.

Back

5

Front

What are factors?

Back

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

Front

What is a prime number?

Back

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.

Front

What is a composite number?

Back

A composite number is a number that has more than two positive divisors.