What two numbers have a GCF of 65?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 65.

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 65. Below is the beginning list of multiples of 65 (1 through 7) in numerical order.

1. 65
2. 130
3. 195
4. 260
5. 325
6. 390
7. 455
etc...

Two numbers that have a GCF of 65 can be 65 and any other number on the list above. Thus, two numbers that have a GCF of 65 are:

65 & 130
65 & 195
65 & 260
etc...

That is not all! Any combination of any multiple of 65 and "odd" multiples of 65 will also have GCF of 65. 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 65.

130 & 195
130 & 325
260 & 325
260 & 455
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 65. 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 65, what are the numbers?" or "What are two numbers whose GCF is 65?"

What two numbers have a GCF of 66?
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