Question

Which of the following pairs are co-primes?
(a) 9 and 12
(b)3 and 8
(c)15 and 3​

Answer 1

Answer:

(b) 3 and 8

Step-by-step explanation:

Let's see the definition

Co prime pairs : No common devisor between those pair numbers.

it means the numbers which can't be devisible by common devisor for those numbers.

When you take 3 & 8 ,where no number can be devisible by common number.

Remaining have common devisors as 9 & 12 have 3 as common devisor, 15 & 3 also have 3 as common devisor,so they are not co prime pairs.

therefore, co-prime = 3 & 8

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Answer 2

Answer:

9and 12

Step-by-step explanation:

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