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

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

    The answer to the Harvard riddle is a simple "No." Forget all of the filler words meant to trick you in the beginning, and pay attention to the last line. It asks you directly if you can solve the ...

  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. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    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. [4] Coloring the edges of the Petersen graph with three colors. [5]

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

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

    The $10,000 prize was split between these twelve, all of whom discovered the correct path, but not the solution to the riddle. If inquired before November 1, 1987, Ventura Associates would have sent one or two letters containing clues to the riddle found in Room #45. Letter #1 [citation needed] Three things should be thrown out;

  6. 78 Riddles for Adults That Will Test Your Smarts - AOL

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  7. 58 Halloween riddles and answers that are positively ... - AOL

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    These Halloween riddles and spooky jokes are guaranteed to scare up all the laughs along with testing kids' and adults' knowledge with clever brainteasers. 58 Halloween riddles and answers that ...

  8. 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.

  9. 4 Pics 1 Word Cheats- Answering Difficult Puzzles - AOL

    www.aol.com/news/2013-02-20-4-pics-1-word-cheats...

    Warning: This article contains spoilers. 4 Pics 1 Word continues to delight and frustrate us. Occasionally, we'll rattle off four to five puzzles with little effort before getting stuck for ...