What two numbers have a GCF of 991?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 991.

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 991. Below is the beginning list of multiples of 991 (1 through 7) in numerical order.

1. 991
2. 1982
3. 2973
4. 3964
5. 4955
6. 5946
7. 6937
etc...

Two numbers that have a GCF of 991 can be 991 and any other number on the list above. Thus, two numbers that have a GCF of 991 are:

991 & 1982
991 & 2973
991 & 3964
etc...

That is not all! Any combination of any multiple of 991 and "odd" multiples of 991 will also have GCF of 991. 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 991.

1982 & 2973
1982 & 4955
3964 & 4955
3964 & 6937
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 991. 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 991, what are the numbers?" or "What are two numbers whose GCF is 991?"

What two numbers have a GCF of 992?
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