Adding Double at Mac App Store analyse

Adding double is a mathematical operation that represents the total amount of objects together in a collection. It is signified by the plus sign (+). How to Play: First of all look at the math addition problem,set the correct sum by pressing + and - button.Press the submit button when you are finished Application will display math addition problem on screen and ask user to solved the problem,users task is to set the answer of problem on screen with [+ or -] button,each correct answer will increase users score by one,for each round of question,application will give two chance to user to set the correct answer,for each round of quiz,user can make maximum of 2 attempt, if fail on second attempt ,application will give detail explanation and then application will generate new round of quiz. Functionality of MENU 
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 Home: Will take you back to main screen at any point of time. You can then choose another quiz. Help: Will take you to the Help screen which will provide needed help on the Application. Support ---------------------------------------- 
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