Sudoku is a logic-based, combinatorial number-placement puzzle game. 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.



Griddition is described as 'Math puzzle game in which you must test your addition skills across over 190 levels of increasing difficulty and enjoyment, earning trophies and bragging rights along the way. Think of Griddition as Sudoku for the 21st century' and is a Puzzle Game in the games category. There are more than 10 games similar to Griddition for a variety of platforms, including Android, Android Tablet, iPad, iPhone and Web-based apps. The best Griddition alternative is Sudoku Challenge, which is free. Other Griddition like games are Sudoku & Variants, Gauguin, Sudoku (FLTK) and Sudoku.best.
Sudoku is a logic-based, combinatorial number-placement puzzle game. 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.



Mathdoku (also called KenKen® and Calcudoku) is a math and logic puzzle similar to Sudoku.




A challenging logic puzzle game inspired by modern password requirements with 100+ levels and 14 languages.




Free Sudoku Puzzles, Sudoku Solver, Printable Sudoku, Sudoku for Kids and more. One of the most popular puzzle games of all time, available online.
Addition is one of the simplest and earliest mathematical tricks taught. Everyone ends up adding two numbers every day for some reason or the other. There couldn't possibly be anything more basic than this.



