Co Prime Numbers | MCQs

Explanation

Co-primes (or relatively prime numbers) are pairs of numbers whose greatest common divisor (GCD) is 1.

Let's check the GCD for each pair:

(23, 92): GCD = 23 (not co-prime).

(21, 35): GCD = 7 (not co-prime).

(12, 28): GCD = 4 (not co-prime).

(18, 25): GCD = 1 (they are co-prime).

Explanation

A Co-prime number is a set of numbers or integers which have only 1 as their common factor i.e. their highest common factor (HCF) will be 1. Co-prime numbers are also known as relatively prime or mutually prime numbers. It is important that there should be two numbers in order to form co-primes.