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  2. Cheryl's Birthday - Wikipedia

    en.wikipedia.org/wiki/Cheryl's_Birthday

    Cheryl's Birthday" is a logic puzzle, specifically a knowledge puzzle. [ 1 ] [ 2 ] The objective is to determine the birthday of a girl named Cheryl using a handful of clues given to her friends Albert and Bernard.

  3. Category:Logic puzzles - Wikipedia

    en.wikipedia.org/wiki/Category:Logic_puzzles

    Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more

  4. List of Martin Gardner Mathematical Games columns - Wikipedia

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

    Challenging chess tasks for puzzle buffs and answers to the recreational problems 1972 Jun: A miscellany of transcendental problems: simple to state but not at all easy to solve 1972 Jul: Amazing mathematical card tricks that do not require prestidigitation 1972 Aug: The curious properties of the Gray code and how it can be used to solve ...

  5. Twenty-One Card Trick - Wikipedia

    en.wikipedia.org/wiki/Twenty-One_Card_Trick

    After three steps, the middle card (*) is the one in all chosen piles. The Twenty-One Card Trick, also known as the 11th card trick or three column trick, is a simple self-working card trick that uses basic mathematics to reveal the user's selected card. The game uses a selection of 21 cards out of a standard deck. These are shuffled and the ...

  6. These 3D Brain Teaser Puzzles Require Logic and Geometry for ...

    www.aol.com/lifestyle/3d-brain-teaser-puzzles...

    The best 3D brain teaser puzzles require logic and spatial awareness to make an exciting game of skill. From Kanoodle to Hanayama, here are the good ones.

  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 ...

  8. Ages of Three Children puzzle - Wikipedia

    en.wikipedia.org/wiki/Ages_of_Three_Children_puzzle

    The Ages of Three Children puzzle (sometimes referred to as the Census-Taker Problem [1]) is a logical puzzle in number theory which on first inspection seems to have insufficient information to solve. However, with closer examination and persistence by the solver, the question reveals its hidden mathematical clues, especially when the solver ...

  9. Wason selection task - Wikipedia

    en.wikipedia.org/wiki/Wason_selection_task

    Which card or cards must be turned over to test the idea that if a card shows an even number on one face, then its opposite face is blue? The Wason selection task (or four-card problem) is a logic puzzle devised by Peter Cathcart Wason in 1966. [1] [2] [3] It is one of the most famous tasks in the study of deductive reasoning. [4]

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