Sudoku 10 x 10 Level 4: Hard Vol. 12: Play Sudoku 10x10 Ten Grid With Solutions Hard Level Volumes 1-40 Sudoku Cross Sums Variation Travel Pap (Paperback) (ISBN-13: 9798729740093)

Let's play Sudoku on a 10x10 grid! Sudoku 10x10 is a variation of the traditional Sudoku grid that must be solved by the rules of Sudoku using the numbers 1 to 10. This logic based number puzzle game using is super fun, kills boredom and is great for taking on the go when you travel by road, plane or train! Help your brain get smarter with this paper based Japanese number puzzle.

Sudoku 10x10 comes in 5 levels: Level 1: Very Easy Vol. 1 - 40, Level 2: Easy Vol. 1 - 40, Level 3: Medium Vol. 1 - 40, Level 4: Hard Vol. 1 - 40 and Level 5: Very Hard Vol. 1 - 40. Collect all 40 volumes of each level and solve them all! Achieve Sudoku greatness!