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  2. 105 Riddles for Adults That Are Sure to Stump You - AOL

    www.aol.com/lifestyle/found-most-impossible...

    We’ve got riddles at all logic levels. Whether you’re looking for something tricky, hard or easy let these riddles for adults (with answers) challenge you. 105 Riddles for Adults That Are Sure ...

  3. 78 Riddles for Adults That Will Test Your Smarts - AOL

    www.aol.com/lifestyle/78-riddles-adults-test...

    You'll have to really stretch your brain to figure out some of these easy, funny, and hard riddles for grown-ups! The post 78 Riddles for Adults That Will Test Your Smarts appeared first on Reader ...

  4. Put Your Brain to the Test With These 101 Tricky Riddles for ...

    www.aol.com/lifestyle/put-brain-test-80-tricky...

    If you want clever brainteasers to test your smarts, we've got you covered with easy, tricky, and hard riddles for adults (with answers) for all skill levels.

  5. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    It is impossible to solve in half of the starting positions. [1] Five room puzzle – Cross each wall of a diagram exactly once with a continuous line. [2] MU puzzle – Transform the string MI to MU according to a set of rules. [3] Mutilated chessboard problem – Place 31 dominoes of size 2×1 on a chessboard with two opposite corners removed ...

  6. I Tried the 'Harvard Riddle'—the 'Hardest Riddle in the World ...

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    According to a YouTuber who shared this video with over 23 million views, 98% of Harvard students can't solve this riddle, which is also referred to as the "I Turn Polar Bears White" riddle. I ...

  7. 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.

  8. Zebra Puzzle - Wikipedia

    en.wikipedia.org/wiki/Zebra_Puzzle

    The Zebra Puzzle is a well-known logic puzzle.Many versions of the puzzle exist, including a version published in Life International magazine on December 17, 1962. The March 25, 1963, issue of Life contained the solution and the names of several hundred successful solvers from around the world.

  9. 48 Short Riddles That Will Still Stump You - AOL

    www.aol.com/48-short-riddles-still-stump...

    Try out these quick, bite-size riddles—some are easy, and some are still pretty tricky! The post 48 Short Riddles That Will Still Stump You appeared first on Reader's Digest.