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2. 24 (puzzle) - Wikipedia

   en.wikipedia.org/wiki/24_(puzzle)

   The 24 puzzle is an arithmetical puzzle in which the objective is to find a way to manipulate four integers so that the end result is 24. For example, for the numbers 4, 7, 8, 8, a possible solution is . The problem has been played as a card game in Shanghai since the 1960s, [ 1] using playing cards. It has been known by other names, including ...

3. Missing square puzzle - Wikipedia

   en.wikipedia.org/wiki/Missing_square_puzzle

   The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.

4. Recreational mathematics - Wikipedia

   en.wikipedia.org/wiki/Recreational_mathematics

   e. Recreational mathematics is mathematics carried out for recreation (entertainment) rather than as a strictly research- and application-based professional activity or as a part of a student's formal education. Although it is not necessarily limited to being an endeavor for amateurs, many topics in this field require no knowledge of advanced ...

5. List of Martin Gardner Mathematical Games columns - Wikipedia

   en.wikipedia.org/wiki/List_of_Martin_Gardner...

   1958 Jan. A collection of tantalizing fallacies of mathematics. 1958 Feb. Concerning the game of Nim and its mathematical analysis. 1958 Mar. About left- and right-handedness, mirror images and kindred matters. 1958 Apr. Concerning the celebrated puzzle of five sailors, a monkey and a pile of coconuts.

6. KenKen - Wikipedia

   en.wikipedia.org/wiki/KenKen

   KenKen. A simple KenKen puzzle, with answers filled in as large numbers. KenKen and KenDoku are trademarked names for a style of arithmetic and logic puzzle invented in 2004 by Japanese math teacher Tetsuya Miyamoto, [ 1] who intended the puzzles to be an instruction-free method of training the brain. [ 2] The name derives from the Japanese ...

7. Logic puzzle - Wikipedia

   en.wikipedia.org/wiki/Logic_puzzle

   Another form of logic puzzle, popular among puzzle enthusiasts and available in magazines dedicated to the subject, is a format in which the set-up to a scenario is given, as well as the object (for example, determine who brought what dog to a dog show, and what breed each dog was), certain clues are given ("neither Misty nor Rex is the German Shepherd"), and then the reader fills out a matrix ...