The HCF of two co-prime numbers is:
- 1
- 2
- 0
- the product of the numbers
Show answer and solution
Correct answer: A. 1
1. Co-prime numbers share no common factor other than 1.
2. The highest common factor is therefore that single shared factor.
3. Hence the HCF of two co-prime numbers is 1.
_Source: RRB Group D CEN-02/2018 PYQ, Q.22._