No, 72 and 252 are not relatively prime. No pair of even numbers can be relatively prime.
they are not relatively prime
No, they are not relatively prime.
No, they are not relatively prime.
72 and 115 are relatively prime, having no common factors greater than 1.
No.
No.
No.
Yes, 55 and 62 are relatively prime because they have no common factor greater than 1.
Yes.
Yes
The greatest common factor of 25 and 72 is 1, so they are relatively prime.