MathG9 app for iPhone and iPad
Maths exercise practice for grade 9. For every correct answer you are awarded 3 points and 2 points will be deducted for every incorrect answer.
Users can also test their skills against each other. In order to use this new feature you have to first enter your nickname. Then, click connect to server. You then can create a game and wait for the opponent to challenge you. You can also challenge another user by clicking on the game that has been created by another user in the game room.