What two numbers have a GCF of 666?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 666.

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 666. Below is the beginning list of multiples of 666 (1 through 7) in numerical order.

1. 666
2. 1332
3. 1998
4. 2664
5. 3330
6. 3996
7. 4662
etc...

Two numbers that have a GCF of 666 can be 666 and any other number on the list above. Thus, two numbers that have a GCF of 666 are:

666 & 1332
666 & 1998
666 & 2664
etc...

That is not all! Any combination of any multiple of 666 and "odd" multiples of 666 will also have GCF of 666. 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 666.

1332 & 1998
1332 & 3330
2664 & 3330
2664 & 4662
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 666. 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 666, what are the numbers?" or "What are two numbers whose GCF is 666?"

What two numbers have a GCF of 667?
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