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  2. List of Martin Gardner Mathematical Games columns - Wikipedia

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

    A fifth collection of "brain-teasers" 1960 Mar: The games and puzzles of Lewis Carroll: 1960 Apr: About mathematical games that are played on boards: 1960 May: Reflections on the packing of spheres: 1960 Jun: Recreations involving folding and cutting sheets of paper 1960 Jul: Incidental information about the extraordinary number pi: 1960 Aug

  3. Best Brain Training Games: Riddles, Brain Teasers, Puzzles ...

    www.aol.com/lifestyle/75-brain-games-guaranteed...

    Exercise your brain and sharpen your mind (the fun way!) with these 13 types of brain training games. The post Best Brain Training Games: Riddles, Brain Teasers, Puzzles, and More appeared first ...

  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. 15 Viral Riddles and Brain Teasers That Will Leave You ... - AOL

    www.aol.com/lifestyle/15-viral-riddles-brain...

    The post 15 Viral Riddles and Brain Teasers That Will Leave You Stumped for Days appeared first on Reader's Digest. Take a stab at these brain busters (including some tricky viral Facebook riddles ...

  6. Brain Age Express - Wikipedia

    en.wikipedia.org/wiki/Brain_Age_Express

    The Arts & Letters edition (Literature edition in Japan and Arts edition in PAL region) features word and memory puzzles. [6] One new puzzle is called Photo Memory, a memory puzzle, where the game will take a picture from either the game itself or from the player's DSi, show it to the player, and then have the player pick between it and other randomly selected images from the player's folder ...

  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]