What two numbers have a GCF of 79?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 79.

There is actually an infinite number of answers to this question. First, note that both the numbers we are looking for must be multiples of 79. Below is the beginning list of multiples of 79 (1 through 7) in numerical order.

1. 79
2. 158
3. 237
4. 316
5. 395
6. 474
7. 553
etc...

Two numbers that have a GCF of 79 can be 79 and any other number on the list above. Thus, two numbers that have a GCF of 79 are:

79 & 158
79 & 237
79 & 316
etc...

That is not all! Any combination of any multiple of 79 and "odd" multiples of 79 will also have GCF of 79. We numbered the multiples above so it would be easy to identify the "odd" multiples (number 1, 3, 5, 7, etc). Thus, here are some more examples of two numbers that also have a GCF of 79.

158 & 237
158 & 395
316 & 395
316 & 553
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 79. The lists we created can go on forever.

Two numbers have a GCF of Calculator
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Teacher Tip: If you are a teacher, you could ask these questions of your students: "I am thinking of two numbers and the GCF is 79, what are the numbers?" or "What are two numbers whose GCF is 79?"

What two numbers have a GCF of 80?
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