# Greatest common factor worksheet

Name _____________________                                        Date:_____________________

 1. 3, 6 Factors of 3:   _______________________ Factors of 6:   _______________________ GCF(3, 6) =   ___________ 2. 8, 12 Factors of 8: _______________________ Factors of 12: _______________________ GCF(8, 12) = ___________ 3. 25, 30 Factors of 25:   _______________________ Factors of 30:   _______________________ GCF(25, 30) =   ___________ 4. 18, 30 Factors of 18: _______________________ Factors of 30: _______________________ GCF(18, 30) = ___________ 5. 35, 42 Factors of 35:   _______________________ Factors of 42:   _______________________ GCF(35, 42) =   ___________ 6. 20, 10 Factors of 20: _______________________ Factors of 10: _______________________ GCF(20, 10) = ___________ 7. 2, 5 Factors of 2:   _______________________ Factors of 5:   _______________________ GCF(2, 5) =   ___________ 8. 21, 7 Factors of 21: _______________________ Factors of 7: _______________________ GCF(21, 7) = ___________ 9. 10, 9 Factors of 10:   _______________________ Factors of 9:   _______________________ GCF(10, 9) =   ___________ 10. 33, 39 Factors of 33: _______________________ Factors of 39: _______________________ GCF(33, 39) = ___________