What two numbers have a GCF of 3420?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 3420.

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 3420. Below is the beginning list of multiples of 3420 (1 through 7) in numerical order.

1. 3420
2. 6840
3. 10260
4. 13680
5. 17100
6. 20520
7. 23940
etc...

Two numbers that have a GCF of 3420 can be 3420 and any other number on the list above. Thus, two numbers that have a GCF of 3420 are:

3420 & 6840
3420 & 10260
3420 & 13680
etc...

That is not all! Any combination of any multiple of 3420 and "odd" multiples of 3420 will also have GCF of 3420. 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 3420.

6840 & 10260
6840 & 17100
13680 & 17100
13680 & 23940
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 3420. 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 3420, what are the numbers?" or "What are two numbers whose GCF is 3420?"

What two numbers have a GCF of 3421?
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