Status: IN
The average-even-divisible-by-three solution collapses `n % 2 == 0 and n % 3 == 0` into `n % 6 == 0` using the fact that lcm(2, 3) = 6, a number-theory simplification that recurs across solutions with coprime divisibility checks.
Source: entries/2026/06/06/average-value-of-even-numbers-that-are-divisible-by-three-solution.md