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  2. Eternity puzzle - Wikipedia

    en.wikipedia.org/wiki/Eternity_puzzle

    An empty Eternity board. The Eternity puzzle is a tiling puzzle created by Christopher Monckton and launched by the Ertl Company in June 1999. It was marketed as being practically unsolvable, with a £1 million prize on offer for whoever could solve it within four years.

  3. 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.

  4. The Secret (treasure hunt) - Wikipedia

    en.wikipedia.org/wiki/The_Secret_(treasure_hunt)

    Clues for where the treasures were buried are provided in a puzzle book named The Secret produced by Byron Preiss and first published by Bantam in 1982. [1] The book was authored by Sean Kelly and Ted Mann and illustrated by John Jude Palencar, John Pierard, and Overton Loyd; JoEllen Trilling, Ben Asen, and Alex Jay also contributed to the book. [2]

  5. Famous Trick Donkeys - Wikipedia

    en.wikipedia.org/wiki/Famous_Trick_Donkeys

    The printed card of the puzzle shows two donkeys, the central part of which has been left blank on purpose. The third part of the card are the riders, and the objective of the puzzle is to arrange the three pieces (the two donkeys and the riders) so the riders are mounted on the donkeys' backs.

  6. Can You Solve the ‘A Man Steals $100 From a Shop’ Riddle?

    www.aol.com/solve-man-steals-100-shop-111000916.html

    At first glance, this riddle involving various dollar amounts would lead you to think some complex math is required to solve it. There's a clear loss of $100 upfront when the money is stolen.

  7. 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 ...

  8. List of unsolved problems in economics - Wikipedia

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

    The exchange rate disconnect puzzle: The exchange rate disconnect puzzle, also one of the so-called real exchange rate puzzles, concerns the weak short-term feedback link between exchange rates and the rest of the economy. In most economies, the exchange rate is the most important relative price, so it is surprising, and thus far unexplained ...

  9. Games on AOL.com: Free online games, chat with others in real ...

    www.aol.com/games/play/anawiki/mystery-riddles

    Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.