Unit 7 Review Quiz (GCF and DOTS)

Common factor of 9 and 12

• 1,2,3

• 1,3,4

• 1,3

Common factors of 6 and 8

• 1,2

• 1,2,3,

• 1,2,3,4

What is the GCF of 18 and 45?

• 3

• 12

• 9

• 6

Greatest common factor of 10 and 20

• 5

• 2

• 10

Greatest common factors of 9 and 15

• 5

• 4

• 3

GCF of 32 and 40

• 2
• 4
• 6
• 8

GCF of 16 and 18

• 4
• 2
• 6
• 8

GCF of 50 and 100

• 10
• 25
• 50
• 5

What is the GCF of 36 and 24?

• 6

• 12

• 8

• 9

GCF of 99 and 54

• 9
• 3
• 6
• 8