What are all the common factors of 15 ,45, 90
The common factors are: 1, 3, 5, 15GCF (greatest common factor): 1515 45 90^1, 3, 5, 15 ^1, 3, 5, 9, 15, 45, ^1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90,