Long before the Sudoku number puzzle became the crack cocaine of brain teasers, a bored Benjamin Franklin jotted down a couple of much more complex number puzzles of his own. But, exactly how the U.S.
Magic Squares: A touch of mysticism and a lot of brain-challenging fun! By Marcel Danesi, Ph.D. in Brain Workout One of the most fascinating number games of all time is the magic square. In its ...
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