Question 161
Find all positive integers $n$ such that
$$
3^{n-1} + 5^{n-1} \mid 3^n + 5^n.
$$
$$
3^{n-1} + 5^{n-1} \mid 3^n + 5^n.
$$
MathNet 2022-part-04 — 197 problems (EN–VI) Question 161
Math Olympiad Vault · MathNet 2022-part-04 — 197 problems (EN–VI)