Question

What is the gcf of 45 and 60

Answer 1

Your greatest common factor will be 15.  

Answer 2

GCF of 45: 1, 3, 5, 9, 15, 45
GCF of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60
15 is the greatest number that can divide evenly to 45 and 60, therefore, 15 is the GCF of 45 and 60