What two numbers have a GCF of 1580?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 1580.

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 1580. Below is the beginning list of multiples of 1580 (1 through 7) in numerical order.

1. 1580
2. 3160
3. 4740
4. 6320
5. 7900
6. 9480
7. 11060
etc...

Two numbers that have a GCF of 1580 can be 1580 and any other number on the list above. Thus, two numbers that have a GCF of 1580 are:

1580 & 3160
1580 & 4740
1580 & 6320
etc...

That is not all! Any combination of any multiple of 1580 and "odd" multiples of 1580 will also have GCF of 1580. 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 1580.

3160 & 4740
3160 & 7900
6320 & 7900
6320 & 11060
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 1580. 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 1580, what are the numbers?" or "What are two numbers whose GCF is 1580?"

What two numbers have a GCF of 1581?
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