Number Magic 


Question : 
What is meant by 'Relatively Prime' Number ? 
Answer : 
Two numbers are called relatively prime or coprime if they have no common divisors greater than 1. 
Denoted by : 
For example : 
(60 / 4880) = ((2^{2} x 5) x 3) / (2^{2}  5) x (2^{2} x 61)
= (3 / (2^{2} x 61))
= 3 / 244

Since 3 is the only prime factor of the numerator and 3 is not a factor of the denominator, the fraction 60/4880 is in its
lowest term. Since the numerator and the denominator do not have any common prime factors they have said to be relatively
prime.
