What two numbers have a GCF of 243?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 243.

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 243. Below is the beginning list of multiples of 243 (1 through 7) in numerical order.

1. 243
2. 486
3. 729
4. 972
5. 1215
6. 1458
7. 1701
etc...

Two numbers that have a GCF of 243 can be 243 and any other number on the list above. Thus, two numbers that have a GCF of 243 are:

243 & 486
243 & 729
243 & 972
etc...

That is not all! Any combination of any multiple of 243 and "odd" multiples of 243 will also have GCF of 243. 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 243.

486 & 729
486 & 1215
972 & 1215
972 & 1701
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 243. 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 243, what are the numbers?" or "What are two numbers whose GCF is 243?"

What two numbers have a GCF of 244?
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