Yes, they are relatively prime.
Yes, 11 and 51 are relatively prime.
It can be. 50 is relatively prime to 51.
No.
No
No.
No.
Yes.
52
Yes.
No, they are not relatively prime.
Yes. 11 is prime. 98 is not prime, but it is not divisible by 11, so the two are relatively prime.
11 is a prime number. For it to be relatively prime, it needs to be compared to another integer.