To be relatively prime, it would have to be compared to another number. When it is, if the GCF, or greatest common factor is 1, then it is relatively prime.
45 and 9 = NO because they have 9 in common.
45 and 31 = Yes because they only have 1 as a common factor.
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39 and 45 are not relatively prime because they have 3 as a common factor. Relatively prime numbers have no common factor greater than 1.
No, they are not.
Yes.
Yes.
nope!