Question 62
Prove that
$$
n(n+1)(2 n+1)
$$
is always divisible by $6$, for $n$ a positive integer.
$$
n(n+1)(2 n+1)
$$
is always divisible by $6$, for $n$ a positive integer.
MathNet 2026 — Part 08 Question 62
Math Olympiad Vault · MathNet 2026 — Part 08