If two or more factors are relatively prime, then they only have 1 as a common factor. Take 7 and 9 for example.
The factors of 7 are 1 and 7
The factors of 9 are 1, 3, and 9
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22 is not relatively prime
yes, they are relatively prime.
Yes, 62 and 121 are relatively prime
False. Consider 4 and 9. Neither are prime, but they have no common factors other than 1 and are therefore relatively prime. More generally, any two numbers p^n and q^n where p, q both prime and n<>p or q and n>1 are relatively prime. This is by no means all pairs of relatively prime numbers, but it's an easy way to find examples where neither of the pair is prime.
211 is a prime number, and is not a factor of 210, so yes, they are relatively prime.