Here we will first tell you what the Greatest Common Factor of 12 and 18 is and then show you how
we found the Greatest Common Factor of 12 and 18.
The Greatest Common Factor of 12 and 18 is:
6
Stepbystep instructions for how to find the Greatest Common Factor of 12 and 18:
Step 1) We made a list of all the factors of 12 which are 1, 2, 3, 4, 6, 12.
Step 2) Then, we made a list of all the factors of 18 which are 1, 2, 3, 6, 9, 18.
Step 3) Finally, we compared the lists in Step 1 and Step 2 to find that the largest number they
have in common is 6. That means that the Greatest Common Factor of 12 and 18 is 6.

