What two numbers have a GCF of 423?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 423.

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 423. Below is the beginning list of multiples of 423 (1 through 7) in numerical order.

1. 423
2. 846
3. 1269
4. 1692
5. 2115
6. 2538
7. 2961
etc...

Two numbers that have a GCF of 423 can be 423 and any other number on the list above. Thus, two numbers that have a GCF of 423 are:

423 & 846
423 & 1269
423 & 1692
etc...

That is not all! Any combination of any multiple of 423 and "odd" multiples of 423 will also have GCF of 423. 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 423.

846 & 1269
846 & 2115
1692 & 2115
1692 & 2961
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 423. 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 423, what are the numbers?" or "What are two numbers whose GCF is 423?"

What two numbers have a GCF of 424?
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