What two numbers have a GCF of 23?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 23.

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 23. Below is the beginning list of multiples of 23 (1 through 7) in numerical order.

1. 23
2. 46
3. 69
4. 92
5. 115
6. 138
7. 161
etc...

Two numbers that have a GCF of 23 can be 23 and any other number on the list above. Thus, two numbers that have a GCF of 23 are:

23 & 46
23 & 69
23 & 92
etc...

That is not all! Any combination of any multiple of 23 and "odd" multiples of 23 will also have GCF of 23. 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 23.

46 & 69
46 & 115
92 & 115
92 & 161
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 23. 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 23, what are the numbers?" or "What are two numbers whose GCF is 23?"

What two numbers have a GCF of 24?
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