Prime numbers are those number (integers) which not divisible by other than itself and 1. Examples of prime numbers are 2, 3, 5, 7, 11....
Two numbers (integers) are said to be relatively prime numbers if there are no common factor other than 1.
Some examples of relatively prime numbers.
(i) 2 and 9
(ii) 3 and 4
(iii) 3 and 10