Sudoku is probably one of the most popular numbers game there is. It trains your brain and evolves your logic.
In this PDF, you get 20 easy sudoku puzzles to get you started. The PDF also consists of correct answers to all the puzzles.
These easy puzzles are a great start to Sudoku.
Use them as a great activity for your students, especially for early finishers in your class. Here they have a great activity to keep them occupied and train their logic as well.
Thes are also great as a problem-solving activity.