1. What is the GCF of 18 and 24?
A) 4
B) 2
C) 6
D) 9

2. What is the GCF of 27 and 45?
A) 2
B) 3
C) 9
D) 5

3. What is the GCF of 12, 14 and 20?
A) 4
B) 2
C) 6
D) 8

4. Are the numbers 9 and 36 relatively prime?
A) no
B) yes
C) maybe
D) only on Fridays.

5. Are the numbers 37 and 42 relatively prime?
A) yes
B) no
C) maybe
D) only on Fridays.

6. Are the numbers 50 and 65 relatively prime?
A) no
B) yes
C) maybe
D) only on Fridays.

7. What is the GCF of 36x^2 and 45x^4?
A) 5x
B) 3x^2
C) 9x^2
D) x^2

8. What is the GCF of 16x^2y and 15y^3z?
A) 3y
B) y
C) z
D) 3

9. What is the GCF of 2, 6, and 9?
A) 6
B) 2
C) 3
D) 1, relatively prime

10. What does the C in GCF stand for?
A) Core
B) Cute
C) Common
D) Cut