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 is the GCF of 18 and 45?

Back

9

Front

What is the GCF of 18 and 24?

Back

6

Front

What is the GCF of 16 and 18?

Back

2

Front

What is the GCF of 8 and 10?

Back

2

Front

What is the GCF of 28 and 49?

Back

7

Front

What is a factor?

Back

A factor is a whole number that can be divided evenly into another number.

Tags

CCSS.4.OA.B.4

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

Can the GCF of two numbers be greater than either of the numbers?

Back

No, the GCF cannot be greater than the smallest of the two numbers.