Sequences, visual equations and arithmetic challenges where the rule is stated and the answer is verified.https://worldofcurious.com/en-auhttps://worldofcurious.com/article/what-comes-next-number-sequence/https://worldofcurious.com/article/what-comes-next-number-sequence/Most sequence puzzles are broken, because several answers fit. This one is generated from a single stated rule, and a validator recalculates the answer independently.Mon, 07 Sep 2026 21:00:00 GMTNumber PuzzlespuzzlenumberssequenceEditorial Teamhttps://worldofcurious.com/article/move-one-matchstick/https://worldofcurious.com/article/move-one-matchstick/A matchstick puzzle with exactly one solution, found by searching every legal single-stick move before publication. Ambiguous matchstick puzzles are the most common broken puzzle online.Wed, 05 Aug 2026 21:00:00 GMTNumber PuzzlespuzzlematchsticknumbersEditorial Team