No. They have 1 and 3 as common factors. Only 1 could be a common factor for them to be relatively prime.
Yes, 4 and 15 are relatively prime.
Yes, they are relatively prime.
Yes, they are relatively prime.
Yes, they are relatively prime.
15 is not a prime number, so it can't be a prime factor.
No.
No!
No.
15 is relatively prime.
Yes, they are.
No.
The prime factors of 237 are: 3, 79