What two numbers have a GCF of 1220?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 1220.

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 1220. Below is the beginning list of multiples of 1220 (1 through 7) in numerical order.

1. 1220
2. 2440
3. 3660
4. 4880
5. 6100
6. 7320
7. 8540
etc...

Two numbers that have a GCF of 1220 can be 1220 and any other number on the list above. Thus, two numbers that have a GCF of 1220 are:

1220 & 2440
1220 & 3660
1220 & 4880
etc...

That is not all! Any combination of any multiple of 1220 and "odd" multiples of 1220 will also have GCF of 1220. 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 1220.

2440 & 3660
2440 & 6100
4880 & 6100
4880 & 8540
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 1220. 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 1220, what are the numbers?" or "What are two numbers whose GCF is 1220?"

What two numbers have a GCF of 1221?
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