What two numbers have a GCF of 121?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 121.

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 121. Below is the beginning list of multiples of 121 (1 through 7) in numerical order.

1. 121
2. 242
3. 363
4. 484
5. 605
6. 726
7. 847
etc...

Two numbers that have a GCF of 121 can be 121 and any other number on the list above. Thus, two numbers that have a GCF of 121 are:

121 & 242
121 & 363
121 & 484
etc...

That is not all! Any combination of any multiple of 121 and "odd" multiples of 121 will also have GCF of 121. 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 121.

242 & 363
242 & 605
484 & 605
484 & 847
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 121. 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 121, what are the numbers?" or "What are two numbers whose GCF is 121?"

What two numbers have a GCF of 122?
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