Greatest Common Factor

How do you find the GCF of 2 or more numbers?

• List the multiples of each number and pick the largest number they have in common

• List the factors of each number and pick the largest number they have in common

• List the factors of each number and pick the smallest number they have in common

• List the multiples of each number and pick the smallest number they have in common

What is the GCF of 8 and 24?

• 1

• 24

• 8

• 4

The GCF of 18 and 30 is 6?

• True

• False

GCF of 16 and 18

• 4
• 2
• 6
• 8

Common factor of 9 and 12

• 1,2,3

• 1,3,4

• 1,3

What is the Greatest Common Factor of 35 and 42?

• 5

• 14

• 7

• 3

What is the Greatest Common Factor of 12 and 48?

• 6

• 12

• 4

• 16

What is the GCF of 18 and 24?

• 3
• 6
• 8
• 9
• 2

Find the GCF of 16 and 20

The GCF of 9 and 36 is 9?

• False

• True