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  2. Twenty-One Card Trick - Wikipedia

    en.wikipedia.org/wiki/Twenty-One_Card_Trick

    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 player selects one at random.

  3. List of Martin Gardner Mathematical Games columns - Wikipedia

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

    Cube-root extraction and the calendar trick, or how to cheat in mathematics 1967 Jun: The polyhex and the polyabolo, polygonal jigsaw puzzle pieces 1967 Jul: Of sprouts and Brussels sprouts, games with a topological flavor 1967 Aug: In which a computer prints out mammoth polygonal factorials: 1967 Sep

  4. Missing dollar riddle - Wikipedia

    en.wikipedia.org/wiki/Missing_dollar_riddle

    There seems to be a discrepancy, as there cannot be two answers ($29 and $30) to the math problem. On the one hand it is true that the $25 in the register, the $3 returned to the guests, and the $2 kept by the bellhop add up to $30, but on the other hand, the $27 paid by the guests and the $2 kept by the bellhop add up to only $29.

  5. 25 Toys and Games That Will Trick Kids Into Learning at Home

    www.aol.com/25-toys-games-trick-kids-113820891.html

    This award-winning math game for the early-elementary set reinforces basic addition and subtraction as kids race their critters through a croc-filled swamp. But don't be surprised if your 10- or ...

  6. Tutor's 'insane' math trick apparently 'works every time' - AOL

    www.aol.com/entertainment/tutors-insane-math...

    This math trick can help you multiply any two-digit number by 11. Arlene Resendiz is TikTok's resident math whiz. ... giving you 352. It works every time," Resendiz said. The math tutor then wrote ...

  7. Mathematical puzzle - Wikipedia

    en.wikipedia.org/wiki/Mathematical_puzzle

    Mathematical puzzles require mathematics to solve them. Logic puzzles are a common type of mathematical puzzle. Conway's Game of Life and fractals, as two examples, may also be considered mathematical puzzles even though the solver interacts with them only at the beginning by providing a set of initial conditions. After these conditions are set ...