What two numbers have a GCF of 85?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 85.

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 85. Below is the beginning list of multiples of 85 (1 through 7) in numerical order.

1. 85
2. 170
3. 255
4. 340
5. 425
6. 510
7. 595
etc...

Two numbers that have a GCF of 85 can be 85 and any other number on the list above. Thus, two numbers that have a GCF of 85 are:

85 & 170
85 & 255
85 & 340
etc...

That is not all! Any combination of any multiple of 85 and "odd" multiples of 85 will also have GCF of 85. 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 85.

170 & 255
170 & 425
340 & 425
340 & 595
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 85. 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 85, what are the numbers?" or "What are two numbers whose GCF is 85?"

What two numbers have a GCF of 86?
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