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“james d hill”

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  • Sangaku #2

    Professor Hill Presents the World's Greatest Number Puzzles!

    by James D. Hill ...
    Sangaku returns with more addictive number puzzles. Similar to the wildly popular Sudoku, the all new Sangaku requires players to fill out a pattern, shape, or grid using mathematical rules. These rules change according to the shape of the board, however, and the numbers presented in sets are also different for every puzzle. If that wasn’t enough, almost every puzzle has more than one solution, ... Read more

    $9.95 USD