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MathNet 2024-part-06 — 165 problems (EN–VI) Question 165

Math Olympiad Vault · MathNet 2024-part-06 — 165 problems (EN–VI)

Question 165

In the space, there is a convex polyhedron $D$ such that for every vertex of $D$, there are an even number of edges passing through that vertex. We choose a face $F$ of $D$. Then we assign each edge of $D$ a positive integer such that for all faces of $D$ different from $F$, the sum of the numbers assigned on the edges of that face is a positive integer divisible by 2024. Prove that the sum of the numbers assigned on the edges of $F$ is also a positive integer divisible by 2024.