What two numbers have a GCF of 1520?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 1520.

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 1520. Below is the beginning list of multiples of 1520 (1 through 7) in numerical order.

1. 1520
2. 3040
3. 4560
4. 6080
5. 7600
6. 9120
7. 10640
etc...

Two numbers that have a GCF of 1520 can be 1520 and any other number on the list above. Thus, two numbers that have a GCF of 1520 are:

1520 & 3040
1520 & 4560
1520 & 6080
etc...

That is not all! Any combination of any multiple of 1520 and "odd" multiples of 1520 will also have GCF of 1520. 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 1520.

3040 & 4560
3040 & 7600
6080 & 7600
6080 & 10640
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 1520. 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 1520, what are the numbers?" or "What are two numbers whose GCF is 1520?"

What two numbers have a GCF of 1521?
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