Greatest Common Factor

What is the Greatest Common Factor of 12 and 18?

What is the GCF of 12 and 30?

What is the GCF of 20 and 30?

What is the GCF of 18 and 24?

• A

• B

• C

• D

Find the GCF of the pair of numbers: 60 and 72

• 12

• 6

• 2

• 18

Is this question asking to find GCF or LCM?

• GCF

• LCM

Marcia wanted to cut 2 ropes into equal lengths with nothing left over.  The pieces of rope are 42 and 18 inches long.   What are the possible longest lengths of rope she can cut?

• 12

• 2

• 9

• 6

greatest common factor of 24 and 48.

• 4

• 12

• 24

• 48

What is the GCF of 6 and 12?

• 2

• 3

• 4

• 6