No they are not.
It can be. 50 is relatively prime to 51.
No, 50 and 65 are not relatively prime.
Yes, they are relatively prime.
An easy way to find a number relatively prime to another number is to find a nearby prime number. For example, 53 is relatively prime with 50. The following pairs are relatively prime. 3, 50 19, 50 37, 50 49, 50 50, 69 50, 201 50, 341 Any number that is not divisible by 2 or 5 will be relatively prime to 50.
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. Even numbers can't be relatively prime to each other.
It can be. 27 is relatively prime to 28.
No combination of non-zero even numbers can be relatively prime.
14 is relatively prime with the two given numbers.
Yes.
A single number cannot be relatively prime. Any pair of numbers between 50 and 100 of which one is a prime will be relatively prime. There are 728 pairs of numbers that are relatively prime and I have neither the time nor patience to list them all!