Question

If n is a prime factor of both 15 and 50, what is the value of n?

Answer 1

5

Explanation:

Take a look at all the prime factors of 15:

3, and 5 are all the prime numbers by which 15 is divisible.

Next, do the same for 50.

2, and 5 are all the prime numbers by which 50 is divisible.

The only common prime factor is 5.