Sudoku -Challenged Math Number Puzzle Game

Sudoku is a logic-based, number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. MAIN FEATURES: - More than 3000 puzzles, 4 levels from easy to expert - Clean and colorful themes - Unlimited hints - Support note mode - Easy to use