Q: Is 20 and 18 relatively prime?

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No, they are not relatively prime.

No, they are not relatively prime.

Yes, they are relatively prime.

Yes, 7 and 20 are relatively prime. The only common factor they have is the number 1, which makes them relatively prime.

no

yes, they are relatively prime.

All odd numbers that can not be divided by 3 evenly would be relatively prime with 18.

Yes, they are. 5 is the only prime factor of 25 and 5 is not a factor of 18, so they have no prime factors in common, which is what relatively prime means.

No combinations of even numbers can be relatively prime.

No.

Yes, 3 and 20 are relatively prime because they have no common factor greater than 1.

No.

Lots of numbers are. To be relatively prime, they would have to have only the number 1 as a common factor. So any number that has any of 2, 3, 6, 9 or 18 as factors are not relative prime to 18. So numbers such as 5, 7, 11, 13 and 17 are relatively prime with 18.

Any odd prime number.

Yes.

Yes

No.

No.

Yes, 20 and 24 are relatively prime. The only factor they share is 1.

no because it is just not

No, they are not.

4, 18

In order to be relatively prime to 12, it can't have the factors 2 or 3. Let's try 5^2 x 7^2 x 11. 13475 has three prime factors, 18 divisors, and is relatively prime to 12.

No, they are not relatively prime.

It can be. 34 is relatively prime to 35. 34 is not relatively prime to 40.

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