Yes, 4 and 15 are relatively prime.
No.
No!
15 is relatively prime.
Two numbers are considered relatively prime if their GCF is 1. 4 and 9 are relatively prime.
Yes, they are.
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, they are not relatively prime.
No, 12 and 15 aren't relatively prime, because they both share as a prime factor 3. Dividing both12 and 15 by 3 gives 4 and 5 respectively. Consecutive numbers are always coprime. Coprime numbers are relatively prime to each other, as they share no prime factors, for example 33 and 35,
13 and 4 are relatively prime.
Yes, they are relatively prime.
No.
No!
No.
Yes, 4 and 21 are relatively prime. Numbers that are relatively prime only have the number 1 as a common factor. That is the case with 4 and 21.