Le Monde Maths Puzzle No. 110: The Meaning of the Party

Le Monde's science section published its 110th maths puzzle, titled "Le sens de la fête" (The Meaning of the Party). The puzzle was created by Mickaël Launay. In the scenario, an event is organized by Zoé, Alice and Betty, who must think hard to attend it. Readers are invited to help the three characters solve the brainteaser. The item appeared in the newspaper's sciences pages under the URL lemonde.fr/sciences/article/2026/09/12/le-sens-de-la-fete-l-enigme-maths-du-monde-n-110_6771193_1650684.html, dated 12 September 2026. No further details of the puzzle's rules or solution are provided in the source material.