Greatest common factor between 15 and 12
- Greatest common factor of 15 and 12
- Greatest common factor of 15 12 and 9
- Greatest common factor of 15 12 and 18
- Greatest common factor of 6 15 and 12
- Greatest common factor of 15 and 120
- Greatest common factor of 15 12 and 10
- Greatest common multiple
- Greatest common factor and least common multiple