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  2. 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. Kookrooster maken 23; 15 Puzzle – Slide fifteen numbered tiles into numerical order. It is impossible to solve in half of the starting positions.

  3. List of unsolved problems in mathematics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    Prizes are often awarded for the solution to a long-standing problem, and some lists of unsolved problems, such as the Millennium Prize Problems, receive considerable attention. This list is a composite of notable unsolved problems mentioned in previously published lists, including but not limited to lists considered authoritative, and the ...

  4. Millennium Prize Problems - Wikipedia

    en.wikipedia.org/wiki/Millennium_Prize_Problems

    The other six Millennium Prize Problems remain unsolved, despite a large number of unsatisfactory proofs by both amateur and professional mathematicians. Andrew Wiles , as part of the Clay Institute's scientific advisory board, hoped that the choice of US$ 1 million prize money would popularize, among general audiences, both the selected ...

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

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

    Goldbach’s Conjecture. 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 ...

  6. List of ciphertexts - Wikipedia

    en.wikipedia.org/wiki/List_of_ciphertexts

    Unsolved [2] 1990 Kryptos: Partially solved (3 out of the 4 ciphertexts solved between 1992 and 1999) 1991 Scorpion ciphers [3] Unsolved 1999 Ricky McCormick's encrypted notes: Unsolved 2006 Smithy code, embedded within the 2006 judgment on The Da Vinci Code case Solved within month of publication 2012–2016 Cicada 3301 puzzles

  7. Category:Unsolvable puzzles - Wikipedia

    en.wikipedia.org/wiki/Category:Unsolvable_puzzles

    Pages in category "Unsolvable puzzles" The following 13 pages are in this category, out of 13 total. This list may not reflect recent changes. ...

  8. This puzzle sat unsolved for 2,500 years — until one student ...

    www.aol.com/puzzle-sat-unsolved-2-500-190935979.html

    “As I turned the pages, these patterns starting emerging, and it all started to make sense.”

  9. 'Wheel of Fortune' contestant pushes back on unsolved puzzle ...

    www.aol.com/entertainment/wheel-fortune...

    In a somewhat tense moment for a show that sticks pretty close to the script day in and day out, Sajak answered, "Oh, well, there you go." Then Ben flashed a thumbs-up to the camera.