It can be. 28 is relatively prime to 33.
Yes, they are relatively prime.
It can be. 27 is relatively prime to 28.
No, 28 and 34 are not relatively prime. No pair of even numbers can be relatively prime, as they always share at least one factor (2).
No, they are not.
No they are not.
No. Even numbers can't be relatively prime to each other.
Yes.
No combination of non-zero even numbers can be relatively prime.
2842 is a single number which is a composite, not a prime.
Yes. Their only common factor is the number 1, so that means they are relatively prime.
No, they have multiple common factors.
No, they are not relatively prime.