GCF and LCM

Which is the GCF of 4 and 12?

• 2

• 4

• 12

Which pair of numbers has a GCF of 6?

• 3 and 18

• 6 and 12

• 12 and 24

Which pair of numbers has a LCM of 20?

• 4 and 5

• 2 and 10

• 5 and 10

Which pair of numbers has a GCF of 10 AND a LCM of 60?

• 2 and 5

• 20 and 30

• 5 and 10

• 15 and 20

What is the GCF of 18 and 24?

• 3
• 6
• 8
• 9

What is the least common multiple (LCM) of 4 and 10?

• 4
• 40
• 15
• 20

Find the Greatest Common Factor (GCF) OF 32 and 64.

• 1
• 2
• 4
• 32

Find the Least Common Multiple of 9 and 6

• 18
• 36
• 38
• 72

What is the LCM of 16 and 24?

• 24
• 48
• 8

What is the LCM of 12 and 18?

• 10

• 6

• 36

• 12