Question

From the choices given below, mark the co-prime numbers.

• A. 2, 110
• B. 10, 20
• C. 9, 24
• D. 4, 5

Answer 1

The correct option is D 4, 5

Co prime numbers have no common factors other that 1.

Option a: 2 and 110 has 2 as a common factor.

Option b: 10 and 20 has 2, 5 and 10 as common factors.

Option c: 9 and 24 has 3 as a common factors.

Option d: 4 and 5 has no common factor other than 1. Hence they are co prime numbers.

So, correct option is 'd'.