How do you get the GCF of 18 and 51?

Answer 1

First:

The factors of 18 are: 1, 2, 3, 6, 9, 18

The factors of 51 are: 1, 3, 17, 51

Next:

The common factors are: 1, 3

Finally:

• The Greatest Common Factor (GCF) is: 3