What two numbers have a GCF of 398?

Here we will explain and show you how to find what two numbers have the Greatest Common Factor (GCF) of 398.

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 398. Below is the beginning list of multiples of 398 (1 through 7) in numerical order.

1. 398
2. 796
3. 1194
4. 1592
5. 1990
6. 2388
7. 2786
etc...

Two numbers that have a GCF of 398 can be 398 and any other number on the list above. Thus, two numbers that have a GCF of 398 are:

398 & 796
398 & 1194
398 & 1592
etc...

That is not all! Any combination of any multiple of 398 and "odd" multiples of 398 will also have GCF of 398. 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 398.

796 & 1194
796 & 1990
1592 & 1990
1592 & 2786
etc...

Like we stated above, there are infinite combinations of two numbers whose GCF is 398. 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 398, what are the numbers?" or "What are two numbers whose GCF is 398?"

What two numbers have a GCF of 399?
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