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  2. 15 puzzle - Wikipedia

    en.wikipedia.org/wiki/15_puzzle

    The 15 puzzle (also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square and more) is a sliding puzzle. It has 15 square tiles numbered 1 to 15 in a frame that is 4 tile positions high and 4 tile positions wide, with one unoccupied position.

  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. Pregnancy and sleep - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_and_sleep

    Pregnancy brings about significant and dynamic physiological changes that can impact sleep and contribute to sleep disorders.These changes encompass structural alterations that may affect the length and quality of sleep, disrupt breathing during sleep, and metabolic shifts that raise the risk of restless legs syndrome.

  5. Talk:15 puzzle - Wikipedia

    en.wikipedia.org/wiki/Talk:15_puzzle

    But mn-1 puzzles can be treated like n^2-1 puzzles with an extra row (i.e. concentrating on the row(s) first) -- 46.173.12.68 10:44, 8 October 2013 (UTC) The classic solution for the n^2-1 puzzle is to create an (n-1)n-1 puzzle by solving the first row and continuing to solve the mn-1 reducing m by 1 each iteration until m=2.

  6. Twins pretend to sleep after hearing mom on the baby monitor

    www.aol.com/article/2015/08/27/twins-pretend-to...

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  7. Here's What Impact Word Games Actually Have On Your Brain ...

    www.aol.com/heres-impact-word-games-actually...

    Here's how that daily crossword puzzle really impacts cognitive functioning. ... not getting enough sleep and not exercising. But if you’re looking for one more reason to play more games, this ...

  8. God's algorithm - Wikipedia

    en.wikipedia.org/wiki/God's_algorithm

    God's algorithm is a notion originating in discussions of ways to solve the Rubik's Cube puzzle, [1] but which can also be applied to other combinatorial puzzles and mathematical games. [2] It refers to any algorithm which produces a solution having the fewest possible moves (i.e., the solver should not require any more than this number).

  9. Alternating group - Wikipedia

    en.wikipedia.org/wiki/Alternating_group

    A 15 puzzle. It can be proved that the 15 puzzle, a famous example of the sliding puzzle, can be represented by the alternating group A 15, [2] because the combinations of the 15 puzzle can be generated by 3-cycles. In fact, any 2k − 1 sliding puzzle with square tiles of equal size can be represented by A 2k−1.