What two numbers have a GCF of 7920?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 7920.

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 7920. Below is the beginning list of multiples of 7920 (1 through 7) in numerical order.

1. 7920
2. 15840
3. 23760
4. 31680
5. 39600
6. 47520
7. 55440
etc...

Two numbers that have a GCF of 7920 can be 7920 and any other number on the list above. Thus, two numbers that have a GCF of 7920 are:

7920 & 15840
7920 & 23760
7920 & 31680
etc...

That is not all! Any combination of any multiple of 7920 and "odd" multiples of 7920 will also have GCF of 7920. 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 7920.

15840 & 23760
15840 & 39600
31680 & 39600
31680 & 55440
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 7920. 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 7920, what are the numbers?" or "What are two numbers whose GCF is 7920?"

What two numbers have a GCF of 7921?
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