What two numbers have a GCF of 320?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 320.

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 320. Below is the beginning list of multiples of 320 (1 through 7) in numerical order.

1. 320
2. 640
3. 960
4. 1280
5. 1600
6. 1920
7. 2240
etc...

Two numbers that have a GCF of 320 can be 320 and any other number on the list above. Thus, two numbers that have a GCF of 320 are:

320 & 640
320 & 960
320 & 1280
etc...

That is not all! Any combination of any multiple of 320 and "odd" multiples of 320 will also have GCF of 320. 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 320.

640 & 960
640 & 1600
1280 & 1600
1280 & 2240
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 320. 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 320, what are the numbers?" or "What are two numbers whose GCF is 320?"

What two numbers have a GCF of 321?
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