Question 174
Given a positive integer $k$. Find the number of non-negative integers that do not exceed $10^k$ and satisfy the following conditions
i) $n$ is divisible by $3$,
ii) The digits of $n$ in decimal representation are in the set $\{2, 0, 1, 5\}$.
i) $n$ is divisible by $3$,
ii) The digits of $n$ in decimal representation are in the set $\{2, 0, 1, 5\}$.