If the gcf of two numbers is 1, they are called relatively prime. find three sets of relatively prime numbers

The GCF can be obtained by taking the prime factors of two numbers then multiplying the common prime factors. IF there are none, then the GCF is 1 and the numbers are called relatively prime.

There are a lot of relatively prime numbers. To name three sets:

3 and 19

7 and 20

15 and 28

For these sets, we see that there are no other common factors except 1. To illustrate the factors:

3 = 1, 3

19 = 1, 19

7 = 1, 7

20 = 1, 2, 2, 5

15 = 1, 3, 5

28 = 1, 2, 2, 7

So we see that only the number 1 is the factor in each set.

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