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Simple Cross Number is constructed on a crossword grid just like a standard crossword, but the digits 1 to 9 are used instead of the letters of the alphabet. In
Here is a puzzle book that will have even the masters begging for mercy--and for more. Almost Impossible Number Puzzles has more than 275 puzzles offering a var
Readers can count on a good time with this book of numerical mysteries. They'll dig into clever number puzzles and gain confidence in their problem-solving skil