What two numbers have a GCF of 729?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 729.

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 729. Below is the beginning list of multiples of 729 (1 through 7) in numerical order.

1. 729
2. 1458
3. 2187
4. 2916
5. 3645
6. 4374
7. 5103
etc...

Two numbers that have a GCF of 729 can be 729 and any other number on the list above. Thus, two numbers that have a GCF of 729 are:

729 & 1458
729 & 2187
729 & 2916
etc...

That is not all! Any combination of any multiple of 729 and "odd" multiples of 729 will also have GCF of 729. 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 729.

1458 & 2187
1458 & 3645
2916 & 3645
2916 & 5103
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 729. 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 729, what are the numbers?" or "What are two numbers whose GCF is 729?"

What two numbers have a GCF of 730?
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