Question

Find the GCF of 15 and 27

Answer 1

First off, do you know what a gcf is? if u do just list them and see what they have in common like this:

1 * 15
3 * 5

1 * 27
3 * 9

Do they have anything in common?

Answer 2

Whatever they both have in common would be your GCF (greatest common factor)

Answer 3

So in this case they both have a 3 in common so the GCF is 3.

Answer 4

So THATS what GCF means!