What two numbers have a GCF of 66?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 66.

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 66. Below is the beginning list of multiples of 66 (1 through 7) in numerical order.

1. 66
2. 132
3. 198
4. 264
5. 330
6. 396
7. 462
etc...

Two numbers that have a GCF of 66 can be 66 and any other number on the list above. Thus, two numbers that have a GCF of 66 are:

66 & 132
66 & 198
66 & 264
etc...

That is not all! Any combination of any multiple of 66 and "odd" multiples of 66 will also have GCF of 66. 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 66.

132 & 198
132 & 330
264 & 330
264 & 462
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 66. 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 66, what are the numbers?" or "What are two numbers whose GCF is 66?"

What two numbers have a GCF of 67?
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