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  2. The Hardest Logic Puzzle Ever - Wikipedia

    en.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

    The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. [ 1 ] [ 2 ] Boolos' article includes multiple ways of solving the problem.

  3. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    This is a list of puzzles that cannot be solved. An impossible puzzle is a puzzle that cannot be resolved, either due to lack of sufficient information, or any number of logical impossibilities.

  4. Gary Gruber - Wikipedia

    en.wikipedia.org/wiki/Gary_Gruber

    [3] [4] [5] His writings included the Gruber's Complete Guide series [6] as well as books and columns of brain teaser puzzles [7] [8] and other articles. [ 9 ] [ 10 ] [ 11 ] He also worked with schools, school districts, state departments of education and other educational organizations in the development of testing and critical thinking skills ...

  5. Challenging brain teasers and mind-bending 3D puzzles - AOL

    www.aol.com/lifestyle/challenging-brain-teasers...

    Here are some of our favorite 3D puzzles and brain teasers on the market. This set of brain teasers is extensive and intriguing enough in design variety to keep your whole family quietly occupied ...

  6. 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 ...

  7. Can you solve these brain teasers?

    www.aol.com/news/2014-05-15-can-you-solve-these...

    Some of these brain teasers are pretty tough, while others are easier than they seem. Just be sure to pause the video if you need a moment to think -- number one may have you smacking your head ...

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