Finding the Greatest Common Factor Made Easy

What does the term 'factor' mean in mathematics?

• A number that is always odd

• A number that can be divided by another number

• A number that can be multiplied by another number to get a product

• A number that is always even

Tags

CCSS.4.OA.B.4

What are the factors of 10?

• 1, 2, 5, 15

• 1, 2, 4, 10

• 1, 3, 5, 10

• 1, 2, 5, 10

What is the greatest common factor (GCF) of 10 and 15?

• 10

• 5

• 2

• 1

Tags

CCSS.4.OA.B.4

Which of the following is a factor pair of 12?

• 1 and 11

• 2 and 6

• 3 and 5

• 4 and 8

What is the GCF of 12 and 6?

• 6

• 2

• 3

• 1

Tags

CCSS.4.OA.B.4

What are the factors of 20?

• 1, 2, 3, 5, 10, 20

• 1, 2, 4, 5, 10, 20

• 1, 2, 4, 6, 10, 20

• 1, 2, 4, 5, 10, 15

What is the GCF of 20 and 10?

• 1

• 2

• 10

• 5

Tags

CCSS.4.OA.B.4

Which of the following is a factor pair of 9?

• 1 and 8

• 2 and 4

• 3 and 3

• 4 and 5

Tags

CCSS.4.OA.B.4

What are the factors of 21?

• 1, 3, 7, 21

• 1, 3, 5, 21

• 1, 2, 3, 7, 21

• 1, 3, 6, 21

What is the GCF of 9 and 21?

• 1

• 9

• 3

• 7