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

Find the GCF of 24 and 30.

Back

6

Front

Find the GCF of 14 and 22.

Back

2

Front

What is the GCF of 10 and 20?

Back

10

Front

What is the GCF of 9 and 36?

Back

9

Front

Find the GCF of 21 and 28.

Back

7

Front

What is the relationship between GCF and prime factorization?

Back

The GCF can be found by multiplying the lowest powers of all prime factors common to the numbers.

Front

What is the GCF of 15 and 25?

Back

5