What is the Greatest Common Factor of 12 and 20?

Greatest Common Factor of 12 and 20

Here we will first tell you what the Greatest Common Factor of 12 and 20 is and then show you how we found the Greatest Common Factor of 12 and 20.

The Greatest Common Factor of 12 and 20 is:

4

Step-by-step instructions for how to find the Greatest Common Factor of 12 and 20:

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 20 which are 1, 2, 4, 5, 10, 20.

Step 3) Finally, we compared the lists in Step 1 and Step 2 to find that the largest number they have in common is 4. That means that the Greatest Common Factor of 12 and 20 is 4.

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