It may surprise you but Sudoku, despite the name, may have its roots in 19th century French number-placement puzzles. Today's logic-based puzzles, like the originals, are often featured in newspapers, Fans also satisfy their need to tackle the puzzles by buying books filled with boxes composed of the well-known 9X9 grids.
To the uninitiated, the puzzles look quite difficult. But, in truth, even children of eight or younger can solve these puzzles and in doing so they hone their logic skills. Although the verdict is still out, many believe seniors improve their age-deteriorating memory by playing the game.