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  2. Maze: Solve the World's Most Challenging Puzzle - Wikipedia

    en.wikipedia.org/wiki/MAZE:_Solve_the_World's...

    Maze: Solve the World's Most Challenging Puzzle (1985, Henry Holt and Company) is a puzzle book written and illustrated by Christopher Manson. The book was originally published as part of a contest to win $10,000. Unlike other puzzle books, each page is involved in solving the book's riddle.

  3. 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.

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

    www.aol.com/tried-harvard-riddle-hardest-riddle...

    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 ...

  5. Notpron - Wikipedia

    en.wikipedia.org/wiki/Notpron

    It has been named as "the hardest riddle available on the internet". [3] Regarded as one of the first of the online puzzle game genre, Notpron follows a standard puzzle game layout, where the player is presented with a webpage containing a riddle and must find the answer to the riddle in order to proceed to the next webpage.

  6. 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 ...

  7. The Viral ‘Green Glass Door’ Riddle Is a Tough One To Solve ...

    www.aol.com/lifestyle/viral-green-glass-door...

    For example, the “green glass door” riddle is an enjoyable brain teaser that has entertained kids and adults alike for years. This riddle really shines as a group activity.

  8. 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 ...

  9. YouTuber offers $100,000 to the first person to solve the ...

    www.aol.com/news/youtuber-offers-100-000-first...

    YouTube star MrBeast, known for his attention-grabbing stunts. shared a video in which he announced a competition to solve the “hardest riddle the internet has ever seen”. He said he spent 100 ...