Question

Are the numbers 15 and 38 coprime? State reason.

Answer 1

Step-by-step explanation:

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

Answer:

Yes, they are co-prime.

Explanation:

Prime factorising both numbers, we get:

15 = 3 × 5.

38 = 2 × 19.

From above,

There is no common factor for 15 and 38, except 1.

We know,

Any two numbers which have only 1 as their common factor, are called Co-prime numbers.

Therefore,

15 and 38 are co-prime numbers.