Balance Numbers app for iPhone and iPad

The purpose of game is to learn mathematical basic opearations like addition, subtraction, multiplication and division. The playing screen generated a question and the player gets 2 chance to answer a question else a new equation (question) is generated. The generated question has one blank space to fill in the answer to balance the number on the right side in accordance to left side of equal sign. Note that after using the number key pad one must click on the "Done" button to make it disappear, and then click on the "check" button so as to check the answer. If a check button is without answering then it wont be counted as a chance to answer question.