Number Master is a free puzzle game developed by -TT- for Android. It is a simple yet addictive game that tests your mental calculation abilities. The objective of the game is to choose three numbers, where one number is equal to the sum of the other two.

The gameplay is straightforward and easy to understand. Players need to use their mental arithmetic skills to solve the puzzles as quickly as possible. Number Master is a fun and challenging game that keeps you engaged for hours. The game is suitable for anyone who enjoys puzzle games and wants to improve their mental math skills.

Overall, Number Master is a great game to play in your free time. It's easy to pick up and play, and the addictive gameplay will keep you coming back for more. So, download Number Master today and challenge yourself to beat your high score!