Question

what's the definition of Co-prime numbers​

Answer 1

Any set of numbers which do not have any other common factor other than 1 are called co-prime or relatively prime numbers.

Answer 2

Any set of numbers which do not have any other common factor other than 1 are called co-prime or relatively prime numbers. This shows that 5 and 6 have no common factor other than 1. Therefore, they are co-prime numbers.