No, 64 and 144 are not relatively prime. To be relatively prime, the only common factor they could have would be 1. They have other common factors such as 2, 4, 8 and 16.
No, they are not relatively prime.
no
No, 144 and 165 are not relatively prime. For them to be relatively prime, the number 1 could be their only common factor, but they also have 3 as a common factor.
No.
No, two even numbers cannot be relatively prime.
Yes.
No.
No, they are not relatively prime. They both have 2 as a common factor. If two or more numbers are relatively prime, that means those numbers have no factors in common except for 1.
The prime factors of 144 are: 2,3
13 and 4 are relatively prime.
Yes, they are relatively prime.