Question

Q.22 Which of the following are co-primes ?
(a) 8,10
(b) 9, 10
(c) 6,8
(d) 15, 18​

Answer 1

$\underline \mathbb{ANSWER:-}$

Option $\implies$ (B)

$\large\mathfrak \pink{Definition:-}$

A number is said to be co-prime if the numbers have no common factor other than 1.

$\underline \mathbb{BY \: THE \: PROBLEM:-}$

9 = 1 , 3 , 9

10 = 1 , 2 , 5 , 10

So, they have only 1 as common factor.

So, they are co-prime.