What is the sum of the GCF and LCM of 21 and 7?

To answer "What is the sum of the GCF and LCM of 21 and 7?", you need to know the GCF of 21 and 7, the LCM of 21 and 7, and the meaning of sum.

The GCF of 21 and 7 means the Greatest Common Factor of 21 and 7 which is 7. The LCM of 21 and 7 means the Least Common Multiple of 21 and 7 which is 21. Sum is the result you get when you add two numbers together.

Now that we have all the pieces, we can calculate the answer to the sum of the GCF and LCM of 21 and 7 as follows:

7 + 21 = 28

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