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

You can find the GCF by listing the factors of each number and identifying the largest factor they have in common.

Front

What is the GCF of 99 and 54?

Back

9

Front

What is the GCF of 12 and 28?

Back

4

Front

What is the GCF of 16 and 40?

Back

8

Front

What is the GCF of 16 and 18?

Back

2

Front

What is the GCF of 15 and 35?

Back

5

Front

List the factors of 12.

Back

1, 2, 3, 4, 6, 12

Front

List the factors of 28.

Back

1, 2, 4, 7, 14, 28

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.