What two numbers have a GCF of 221?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 221.

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 221. Below is the beginning list of multiples of 221 (1 through 7) in numerical order.

1. 221
2. 442
3. 663
4. 884
5. 1105
6. 1326
7. 1547
etc...

Two numbers that have a GCF of 221 can be 221 and any other number on the list above. Thus, two numbers that have a GCF of 221 are:

221 & 442
221 & 663
221 & 884
etc...

That is not all! Any combination of any multiple of 221 and "odd" multiples of 221 will also have GCF of 221. 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 221.

442 & 663
442 & 1105
884 & 1105
884 & 1547
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 221. 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 221, what are the numbers?" or "What are two numbers whose GCF is 221?"

What two numbers have a GCF of 222?
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