Question

Check whether 15 (to the power) n can end with digit 0 for any natural number n.

Answer 1

15ⁿ do not end with digit 0 for any natural number n.
It always ends with 5.

Answer 2

15^n = (3 × 5)^n
Since, 3^n or 5^n cannot end with 5, 15^n cannot end with 5.