Question

Prove wether 15^n where n is a natural no. can end with zero or not?

Answer 1

Answer:

The prime factorization of 15 doesn't have a 2 and 5 as its factor. So, its factorization will never end in 10 as a number ending in 10 must have a factors as 5 and 2. So, 15n will never end in zero as 15 doesn't has 2 as a factor.