To score 100% marks in any subject, the first quality required is enthusiasm and willingness to work hard the correct way. There are approximately 150 main concepts in macroeconomics. These are: National income accounting and determination of income and employment. These carry 10 marks and 12 marks respectively. These should be carefully understood and at least 30 to 40 questions each must be solved. Your concerned teacher could help you in selecting these questions. The definitions of all important terms should be written at one place. In Indian economics, all chapters are unique in themselves. NCERT solutions should be thoroughly practiced. A week before the examination, three model papers should be solved and got evaluated from an eminent teacher.
It is usual to have a project work of 20 marks. The CBSE has given vast choice in selection of topics so you should be careful in choosing the topic. You should be able to answer any question (the viva question will be asked from the project file made by you).