WriteAnswers app for iPhone and iPad
In this game, You will be shown random numbers on a screen. Now you have to perform some calculations based on the question asked to you. You will be asked either to sum up the biggest and smallest no. or subtract the lowest no. from the highest no. Now after that you have to write the correct answer. You will be given onscreen keyboard for that. Right answer will earn you a point. Both games have 3 difficulty modes. The difficulty will vary as you progress in the game.