What two numbers have a GCF of 127?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 127.

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 127. Below is the beginning list of multiples of 127 (1 through 7) in numerical order.

1. 127
2. 254
3. 381
4. 508
5. 635
6. 762
7. 889
etc...

Two numbers that have a GCF of 127 can be 127 and any other number on the list above. Thus, two numbers that have a GCF of 127 are:

127 & 254
127 & 381
127 & 508
etc...

That is not all! Any combination of any multiple of 127 and "odd" multiples of 127 will also have GCF of 127. 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 127.

254 & 381
254 & 635
508 & 635
508 & 889
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 127. 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 127, what are the numbers?" or "What are two numbers whose GCF is 127?"

What two numbers have a GCF of 128?
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