Question

What is co-prime number?

Answer 1

In number theory, two integers a and b are said to be relatively prime mutually prime or co-prime if the only positive integer that divides both of them is 1.That is,the only common positive factor of the two numbers is 1. This is equivalent to their greatest common diviser being 1.
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Answer 2

the numbers having HCF 1 are called as coprime no.