What two numbers have a GCF of 623?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 623.

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 623. Below is the beginning list of multiples of 623 (1 through 7) in numerical order.

1. 623
2. 1246
3. 1869
4. 2492
5. 3115
6. 3738
7. 4361
etc...

Two numbers that have a GCF of 623 can be 623 and any other number on the list above. Thus, two numbers that have a GCF of 623 are:

623 & 1246
623 & 1869
623 & 2492
etc...

That is not all! Any combination of any multiple of 623 and "odd" multiples of 623 will also have GCF of 623. 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 623.

1246 & 1869
1246 & 3115
2492 & 3115
2492 & 4361
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 623. 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 623, what are the numbers?" or "What are two numbers whose GCF is 623?"

What two numbers have a GCF of 624?
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