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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. Numberlink - Wikipedia

    en.wikipedia.org/wiki/Numberlink

    Numberlink is a type of logic puzzle involving finding paths to connect numbers in a grid. Rules [ edit ] The player has to pair up all the matching numbers on the grid with single continuous lines (or paths).

  4. List of Martin Gardner Mathematical Games columns - Wikipedia

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

    Tests that show whether a large number can be divided by a number from 2 to 12 1962 Oct: A collection of puzzles involving numbers, logic, and probability 1962 Nov: Some puzzles based on checkerboards: 1962 Dec: Some simple tricks and manipulations from the ancient lore of string play: 1963 Jan: The author pays his annual visit to Dr. Matrix ...

  5. Missing dollar riddle - Wikipedia

    en.wikipedia.org/wiki/Missing_dollar_riddle

    The actual solution to this riddle is to add correctly (correct time, correct person and correct location) from the bank point of view which in this case seems to be the problem: First day: $30 in the bank + $20 owner already withdrew = $50. Second day: $15 in the bank + ($15 + $20 owner already withdrew) = $50.

  6. Sum and Product Puzzle - Wikipedia

    en.wikipedia.org/wiki/Sum_and_Product_Puzzle

    Sum and Product Puzzle. The Sum and Product Puzzle, also known as the Impossible Puzzle because it seems to lack sufficient information for a solution, is a logic puzzle. It was first published in 1969 by Hans Freudenthal, [1] [2] and the name Impossible Puzzle was coined by Martin Gardner. [3] The puzzle is solvable, though not easily.

  7. Logic puzzle - Wikipedia

    en.wikipedia.org/wiki/Logic_puzzle

    The data set of a logic grid puzzles can be any number of categories, but are limited by the corresponding increase in complexity, with most having only two, three, or even four categories. While designed more as a table-based puzzle than a matrix, the most famous example of a logic-grid puzzle may be the so-called Zebra Puzzle, which asks the ...

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