Question

which of thr two pair is coprime
(i) 15, 18
or
(ii) 16,21 ​

Answer 1

Answer:

Co prime numbers are those numbers which are composite but have no factor in common (except 1)

Let's check the first option

15 and 18 have a common factor 3 so the first pair is not co-prime.

The second pair 16 and 21 both are composite yet both do not have nothing in common(except 1)

Hence,16,21 is the co-prime pair

Note: A pair that is consecutive (which comes one after the other is always co-prime).Ex 8,9&9,10 and so on.

Answer 2

Answer:

16 and 21 are coprime numbers.

Step-by-step explanation:

hope it helps u...