No, 5 is a common factor to both.
No. Neither number is prime.
No, 75 and 625 are not relatively prime. No pair of numbers that both end in 5 can be relatively prime.
No they are not...
No, 60 and 75 are not relatively prime because their greatest common factor is 15 and not 1. In order for them to be relatively prime, 1 must be their greatest common factor.
yes they are
14 is relatively prime with the two given numbers.
No, both are divisible by 25.