What two numbers have a GCF of 155?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 155.

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 155. Below is the beginning list of multiples of 155 (1 through 7) in numerical order.

1. 155
2. 310
3. 465
4. 620
5. 775
6. 930
7. 1085
etc...

Two numbers that have a GCF of 155 can be 155 and any other number on the list above. Thus, two numbers that have a GCF of 155 are:

155 & 310
155 & 465
155 & 620
etc...

That is not all! Any combination of any multiple of 155 and "odd" multiples of 155 will also have GCF of 155. 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 155.

310 & 465
310 & 775
620 & 775
620 & 1085
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 155. 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 155, what are the numbers?" or "What are two numbers whose GCF is 155?"

What two numbers have a GCF of 156?
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