- Read business newspapers and magazines. Try your best to analyze the data given in pie-charts / bar-graphs, etc.
- Improve your calculations, by learning basic multiplication tables to advanced techniques of approximations.
- Have a look at the options, before solving any DI question. This is very important: The difference in the magnitude of options will tell you ‘how much you can approximate’. This will save you a lot of time and frustration during the exam.
Hope that helps!