Question

Which of the following pair is co-prime
(a) 6 and 8
(b) 18 and 35
(c) 7 and 35
(d) 30 and 415

Answer 1

Heya!!

Thanks for asking the question.

Answer : (b)

What are co-prime numbers ?
- Co prime no.s are a pair of two no.s which do not have a common factor other than 1.

Now we will check for the required conditions for co prime no.s in each of the following options.

(a) They can't be co prime as they have a common factor 2 other than 1.

(b) They are co prime since they don't have any common factor other than 1.
18= 9×2
35=7×5

(c) They have a common factor other than 1 i.e 7.

(d) They also have a common factor other than 1 i.e 5.


Conclusion : The options (a),(c), and (d) are validated and (b) is the correct answer.



Hope it helps you :)

Answer 2

Answer:

b is the correct answer .........