What two numbers have a GCF of 820?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 820.

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 820. Below is the beginning list of multiples of 820 (1 through 7) in numerical order.

1. 820
2. 1640
3. 2460
4. 3280
5. 4100
6. 4920
7. 5740
etc...

Two numbers that have a GCF of 820 can be 820 and any other number on the list above. Thus, two numbers that have a GCF of 820 are:

820 & 1640
820 & 2460
820 & 3280
etc...

That is not all! Any combination of any multiple of 820 and "odd" multiples of 820 will also have GCF of 820. 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 820.

1640 & 2460
1640 & 4100
3280 & 4100
3280 & 5740
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 820. 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 820, what are the numbers?" or "What are two numbers whose GCF is 820?"

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