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  2. 25 Printable Brain Teasers You Can Print for Free - AOL

    www.aol.com/25-printable-brain-teasers-print...

    How many of these brain busters can you solve? The post 25 Printable Brain Teasers You Can Print for Free appeared first on Reader's Digest.

  3. 14 Visual Brain Teasers and Puzzles That Will Leave You ... - AOL

    www.aol.com/lifestyle/14-visual-brain-teasers...

    Brain benefits: You might think the only benefit of a movie puzzle is showing off your pop culture IQ, but the truth is, these visual brain teasers help with memory and recall, too. Play Now 9.

  4. 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]

  5. 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.

  6. Recreational mathematics - Wikipedia

    en.wikipedia.org/wiki/Recreational_mathematics

    Some of the more well-known topics in recreational mathematics are Rubik's Cubes, magic squares, fractals, logic puzzles and mathematical chess problems, but this area of mathematics includes the aesthetics and culture of mathematics, peculiar or amusing stories and coincidences about mathematics, and the personal lives of mathematicians.

  7. 58 Brain Teasers That Will Leave You Stumped - AOL

    www.aol.com/56-brain-teasers-leave-stumped...

    The post 58 Brain Teasers That Will Leave You Stumped appeared first on Reader's Digest. Solving logic problems boosts brain power, keeps your memory strong, and entertains everyone to no end. See ...

  8. Monty Hall problem - Wikipedia

    en.wikipedia.org/wiki/Monty_Hall_problem

    The Monty Hall problem is a brain teaser, in the form of a probability puzzle, based nominally on the American television game show Let's Make a Deal and named after its original host, Monty Hall. The problem was originally posed (and solved) in a letter by Steve Selvin to the American Statistician in 1975.

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

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