Question

Why are the numbers 16 and 21 called relatively prime?

Answer 1

When two numbers have no common factors other than 1.

In other words there is no value that you could divide them both by exactly (without any remainder).

Explanation:

Answer 2

Relative prime are the numbers which dont share any of there factors.

Explanation:

Relative prime are the numbers which dont share any of there factors. but still they dont share any of there prime cofactors as you can see there factors are different, so they are called as relatively prime. following are the some example of relatively prime numbers . (27,8), (21, 16) , ( 28, 45).