Question

Are the numbers 15 and 38 co-prime? State reason.

Answer 1

Answer:

Factors of 15 are 1, 3, 5 and 15. Factors of 37 are 1 and 37. Therefore, 1 is the only common factor of 15 and 37 which means that 15 and 37 are co-prime.

Answer 2

Factors of 15 are 1, 3, 5 and 15. Factors of 38 are 1 ,2,18,38. Therefore, 1 is the only common factor of 15 and 38 which means that 15 and 38 are co-primes.