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