It can be. 28 is relatively prime to 33.
No, 75 and 625 are not relatively prime. No pair of numbers that both end in 5 can be relatively prime.
No, since they are not relatively prime.
Yes, they are relatively prime.
No.
No they are not...
No.
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, 60 and 75 are not relatively prime because their greatest common factor is 15 and not 1. In order for them to be relatively prime, 1 must be their greatest common factor.
Yes.
yes they are