What two numbers have a GCF of 685?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 685.

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 685. Below is the beginning list of multiples of 685 (1 through 7) in numerical order.

1. 685
2. 1370
3. 2055
4. 2740
5. 3425
6. 4110
7. 4795
etc...

Two numbers that have a GCF of 685 can be 685 and any other number on the list above. Thus, two numbers that have a GCF of 685 are:

685 & 1370
685 & 2055
685 & 2740
etc...

That is not all! Any combination of any multiple of 685 and "odd" multiples of 685 will also have GCF of 685. 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 685.

1370 & 2055
1370 & 3425
2740 & 3425
2740 & 4795
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 685. 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 685, what are the numbers?" or "What are two numbers whose GCF is 685?"

What two numbers have a GCF of 686?
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