240 HARD puzzles for SUDOKULarge characters4 puzzles per page60 pages of sudoku exercises plus 60 pages of solutions (total: 120 pages)Size 6 inch x 9 InchSUDOKU puzzles are known to reduce anxiety, Great for memory training, great fun and easy to learnEven if you have absolutely no math skills.
HOW TO DO?Simply enter the numbers 1 to 9 once in each row, column and box to solve each sudoku
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