Greatest Common Factor 1-20

GCF of 10 and 15?

• 3
• 5
• 2
• 8

GCF of 9 and 12?

• 3
• 2
• 6
• 4

GCF of 15 and 16?

• 1
• 3
• 2
• 4

GCF of 4 and 12

• 4
• 8
• 6
• 2

GCF of 9 and 18

• 12
• 15
• 9
• 6

GCF of 12 and 20

• 10
• 6
• 2
• 4

GCF of 7 and 14

• 7
• 5
• 3
• 1

GCF of 9 and 15

• 7
• 3
• 1
• 5

GCF of 3 and 18

• 12
• 3
• 6
• 9

GCF of 8 and 20

• 2
• 6
• 4
• 10