What is the Greatest Common Factor of 40 and 70?

Greatest Common Factor of 40 and 70

Here we will first tell you what the Greatest Common Factor of 40 and 70 is and then show you how we found the Greatest Common Factor of 40 and 70.

The Greatest Common Factor of 40 and 70 is:

10

Step-by-step instructions for how to find the Greatest Common Factor of 40 and 70:

Step 1) We made a list of all the factors of 40 which are 1, 2, 4, 5, 8, 10, 20, 40.

Step 2) Then, we made a list of all the factors of 70 which are 1, 2, 5, 7, 10, 14, 35, 70.

Step 3) Finally, we compared the lists in Step 1 and Step 2 to find that the largest number they have in common is 10. That means that the Greatest Common Factor of 40 and 70 is 10.

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