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  2. Wason selection task - Wikipedia

    en.wikipedia.org/wiki/Wason_selection_task

    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] An example of the puzzle is: You are shown a set of four cards placed on a table, each of which has a number on one side and a color on the other.

  3. The ClueFinders 4th Grade Adventures: Puzzle of the Pyramid

    en.wikipedia.org/wiki/The_ClueFinders_4th_Grade...

    The ClueFinders 4th Grade Adventures: Puzzle of the Pyramid is a computer game in The Learning Company's The ClueFinders series, where the ClueFinders embark on an Egyptian adventure to save the world from the forces of chaos and Alistair Loveless.

  4. Missing dollar riddle - Wikipedia

    en.wikipedia.org/wiki/Missing_dollar_riddle

    The misdirection in this riddle is in the second half of the description, where unrelated amounts are added together and the person to whom the riddle is posed assumes those amounts should add up to 30, and is then surprised when they do not ⁠— ⁠there is, in fact, no reason why the (10 ⁠− ⁠1) ⁠× ⁠3 ⁠ + ⁠2 ⁠ = ⁠29 sum should add up to 30.

  5. Category:Logic puzzles - Wikipedia

    en.wikipedia.org/wiki/Category:Logic_puzzles

    Pages in category "Logic puzzles" The following 87 pages are in this category, out of 87 total. This list may not reflect recent changes. * Logic puzzle; A.

  6. Bridge and torch problem - Wikipedia

    en.wikipedia.org/wiki/Bridge_and_torch_problem

    The puzzle is known to have appeared as early as 1981, in the book Super Strategies For Puzzles and Games. In this version of the puzzle, A, B, C and D take 5, 10, 20, and 25 minutes, respectively, to cross, and the time limit is 60 minutes. [6] [7] In all these variations, the structure and solution of the puzzle remain the same.

  7. KenKen - Wikipedia

    en.wikipedia.org/wiki/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]

  8. Knights and Knaves - Wikipedia

    en.wikipedia.org/wiki/Knights_and_Knaves

    A large class of elementary logical puzzles can be solved using the laws of Boolean algebra and logic truth tables. Familiarity with Boolean algebra and its simplification process will help with understanding the following examples. Alice and Bob are residents of the island of knights and knaves.

  9. Nine dots puzzle - Wikipedia

    en.wikipedia.org/wiki/Nine_dots_puzzle

    The "nine dots" puzzle. The puzzle asks to link all nine dots using four straight lines or fewer, without lifting the pen. The nine dots puzzle is a mathematical puzzle whose task is to connect nine squarely arranged points with a pen by four (or fewer) straight lines without lifting the pen or retracing any lines.

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