Question

13. What are co-primes? Give examples of live pairs of co-primes. Are comprimes always
primes? If no, illustrate your answer by an example.​

Answer 1

Step-by-step explanation:

Two numbers are said to beco-prime if they do not have a common factor other than 1. 2, 3; 3, 4; 4, 5; 5, 6; 6, 7 arethe examples of five pairs of co-primes. No. 15, 16 are co-prime but both of the numbers are not prime.

Answer 2

Answer:

Answers

two numbers are termed as co-prime whenever two number share no common factor.

(3,5) (7,9) (10,13) (15,16) (17,19)

No, the co-prime are not always prime because the condition for a pair of number to be co-prime is that that should not share no common factor.

for example

let us take two co-prime number

27 and 64 factors of two numbers are

27 = 3 \times 3 \times 3

64 = 4 \times 4 \times 4

so they share no common factor so they are co-prime

but neither of them are prime number