Name: _________________________
Date: _______________________
Greatest Common Factor
Find the greatest common factor of each of the following sets of numbers
by making a list. J
1. 3 and 9
2. 12 and 18
3. 10 and 15
4. 45 and 75
5. 9, 18 and 42
6. 14, 35, and 84
Find the greatest common factor of each of the following sets of numbers
using prime factorization. J
7. 21 and 25
8. 37 and 81
9. 48 and 60
10. 4 and 16
11. 18 and 30
12. 16, 52 and 76