What two numbers have a GCF of 280?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 280.

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 280. Below is the beginning list of multiples of 280 (1 through 7) in numerical order.

1. 280
2. 560
3. 840
4. 1120
5. 1400
6. 1680
7. 1960
etc...

Two numbers that have a GCF of 280 can be 280 and any other number on the list above. Thus, two numbers that have a GCF of 280 are:

280 & 560
280 & 840
280 & 1120
etc...

That is not all! Any combination of any multiple of 280 and "odd" multiples of 280 will also have GCF of 280. 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 280.

560 & 840
560 & 1400
1120 & 1400
1120 & 1960
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 280. 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 280, what are the numbers?" or "What are two numbers whose GCF is 280?"

What two numbers have a GCF of 281?
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