What two numbers have a GCF of 1290?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 1290.

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 1290. Below is the beginning list of multiples of 1290 (1 through 7) in numerical order.

1. 1290
2. 2580
3. 3870
4. 5160
5. 6450
6. 7740
7. 9030
etc...

Two numbers that have a GCF of 1290 can be 1290 and any other number on the list above. Thus, two numbers that have a GCF of 1290 are:

1290 & 2580
1290 & 3870
1290 & 5160
etc...

That is not all! Any combination of any multiple of 1290 and "odd" multiples of 1290 will also have GCF of 1290. 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 1290.

2580 & 3870
2580 & 6450
5160 & 6450
5160 & 9030
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 1290. 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 1290, what are the numbers?" or "What are two numbers whose GCF is 1290?"

What two numbers have a GCF of 1291?
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