- 1. What is the GCF of 18 and 24?
A) 9
B) 6
C) 4
D) 2
- 2. What is the GCF of 27 and 45?
A) 9
B) 2
C) 5
D) 3
- 3. What is the GCF of 12, 14 and 20?
A) 2
B) 6
C) 8
D) 4
- 4. Are the numbers 9 and 36 relatively prime?
A) yes
B) only on Fridays.
C) maybe
D) no
- 5. Are the numbers 37 and 42 relatively prime?
A) only on Fridays.
B) yes
C) no
D) maybe
- 6. Are the numbers 50 and 65 relatively prime?
A) no
B) maybe
C) yes
D) only on Fridays.
- 7. What is the GCF of 36x2 and 45x4?
A) 9x2
B) x2
C) 5x
D) 3x2
- 8. What is the GCF of 16x2y and 15y3z?
A) y
B) 3y
C) 3
D) z
- 9. What is the GCF of 2, 6, and 9?
A) 3
B) 1, relatively prime
C) 6
D) 2
- 10. What does the C in GCF stand for?
A) Cut
B) Cute
C) Core
D) Common
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