GCF

Find the Greatest Common Factor of the following sets of numbers:

1. 5 and 25
2. 6 and 7
3. 10 and 55
4. 12 and 48
5. 12 and 30
6. 50 and 90
7. 45 and 105
8. 12, 20, and 80
9. 14, 28, and 56
10. 15, 25, and 100