Question

which of the following pairs are co prime. 18 and 35,216 and 215, 30and 415,17 and 68. please answer fast​

Answer 1

Answer:

As they have no common factors, 15 and 37 are co-prime numbers. As they have a common factor - 5, hence 30 and 415 are not co-prime. As they have no common factors, 17 and 168 are coprime numbers. As they have no common factors, 216 and 215 are coprime numbers.

Answer 2

Answer:

since two factor are common between 17 and 68, they are not co prime numbers. factors of 216: 1,2,3,4,6,8,9,12,18,24,27,36,54,72,102,216. factors of 215: 1,5,43,215. yes, they are co-prime numbers because only one factor is common that is 1.