Greatest Common Factor Quiz

What is the Greatest Common Factor of these numbers?
1. 6, 8
A 6
B 2
C 48
2. 15, 25
A 15
B 2
C 5
3. 4, 8
A 4
B 2
C 1
4. 6, 9
A 3
B 6
C 9
5. 10, 15
A 150
B 25
C 5
6. 14, 35
A 1
B 7
C 21
7. 12, 20
A 3
B 4
C 10
8. 12, 15, 24
A 3
B 4
C 5
9. 4, 8, 10
A 2
B 22
C 480
10. 3, 13, 23
A 3
B 1
C 0

 

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