What two numbers have a GCF of 68?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 68.

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 68. Below is the beginning list of multiples of 68 (1 through 7) in numerical order.

1. 68
2. 136
3. 204
4. 272
5. 340
6. 408
7. 476
etc...

Two numbers that have a GCF of 68 can be 68 and any other number on the list above. Thus, two numbers that have a GCF of 68 are:

68 & 136
68 & 204
68 & 272
etc...

That is not all! Any combination of any multiple of 68 and "odd" multiples of 68 will also have GCF of 68. 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 68.

136 & 204
136 & 340
272 & 340
272 & 476
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 68. 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 68, what are the numbers?" or "What are two numbers whose GCF is 68?"

What two numbers have a GCF of 69?
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