What is the Greatest Common Factor of 12 and 42?

Greatest Common Factor of 12 and 42

Here we will first tell you what the Greatest Common Factor of 12 and 42 is and then show you how we found the Greatest Common Factor of 12 and 42.

The Greatest Common Factor of 12 and 42 is:

6

Step-by-step instructions for how to find the Greatest Common Factor of 12 and 42:

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 42 which are 1, 2, 3, 6, 7, 14, 21, 42.

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 42 is 6.

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