Greatest Common Factor

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (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

To find the GCF, list the factors of each number, then 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.

Tags

CCSS.4.OA.B.4

Front

What is the GCF of 30 and 49?

Back

1

Front

What is the GCF of 12 and 20?

Back

4

Front

What is the GCF of 60 and 75?

Back

15

Front

What is the GCF of 60 and 82?

Back

2

Front

What is the GCF of 56 and 6?

Back

2

Front

Can the GCF of two numbers be larger than both numbers?

Back

No, the GCF cannot be larger than the smallest number.

Front

What is the GCF of two prime numbers?

Back

The GCF of two prime numbers is always 1, since they have no common factors other than 1.