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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. A translation in Italian was published earlier in the newspaper La Repubblica, under the title L'indovinello ...

  3. Notpron - Wikipedia

    en.wikipedia.org/wiki/Notpron

    Platform (s) Browser based. Release. WW: 2004. Genre (s) Puzzle game. Notpron (originally stylized as Not Pr0n [1]) is an online puzzle game and internet riddle created in 2004 by German game developer David Münnich. [2] It has been hailed by fans, journalists, and Münnich himself [3] as "the hardest riddle available on the internet". [4]

  4. List of impossible puzzles - Wikipedia

    en.wikipedia.org/wiki/List_of_impossible_puzzles

    An impossible puzzle is a puzzle that cannot be resolved, either due to lack of sufficient information, or any number of logical impossibilities. 15 Puzzle – Slide fifteen numbered tiles into numerical order. Impossible for half of the starting positions. Five room puzzle – Cross each wall of a diagram exactly once with a continuous line.

  5. 10 Hard Math Problems That Even the Smartest People in the ...

    www.aol.com/10-hard-math-problems-even-150000090...

    One of the greatest unsolved mysteries in math is also very easy to write. Goldbach’s Conjecture is, “Every even number (greater than two) is the sum of two primes.”. You check this in your ...

  6. The best brain-busting riddles for adults and kids - AOL

    www.aol.com/news/time-kill-brain-busting-riddles...

    What did the sea say to the sand? Nothing, it just waved. I have no life, but I can die. What am I? A battery. I go around the world, but never leave the corner.

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

    www.aol.com/news/55-halloween-riddles-answers...

    I have many teeth, but don't bite. What am I? Answer: A comb.. I have five fingers and a thumb, but I will never be alive. What am I? Answer: A glove. I have a tail and four feet, but no arms or legs.

  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. The puzzle is often called Einstein's Puzzle or ...

  9. 100 prisoners problem - Wikipedia

    en.wikipedia.org/wiki/100_prisoners_problem

    100 prisoners problem. Each prisoner has to find their own number in one of 100 drawers, but may open only 50 of the drawers. The 100 prisoners problem is a mathematical problem in probability theory and combinatorics. In this problem, 100 numbered prisoners must find their own numbers in one of 100 drawers in order to survive.