Yes, they are relatively prime.
Yes, 9 and 16 are relatively prime. They do not have any prime factors in common.
Yes, they are.
Yes
Yes.
Yes.
Yes.
Yes.
Yes, 16 and 39 are relatively prime. This is because the only greatest common factor they have is 1 that means these two numbers are relatively prime.
16 is not prime.
Yes for example 5+11 = 16
Yes. The factors of 16 are 1,2,4,8,16 and the factors of 27 are 1,3,9,27 making 1 their only common factor. This makes them relatively prime.