Sudoku -Challenged Math Number Puzzle Game!

Sudoku is a logic-based, number-placement puzzle. The objective is to fill a 99 grid with digits so that each column, each row, and each of the nine 33 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