Question

is 15 and 39 are co prime

give in step
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Answer 1

Factors of 15 = 1, 3, 5,15

Factors of 39 = 1,3,13

Common factor of 15 and 39 = 1,3

since both have more than one common factor, i.e., 1 and 3, therefore, they are not co-prime numbers.