In DI Questions involving Tablular data, What should be the approach to get accurate as well as faster answers.Ex : We are given yearly production data and we need to calculate average change per year etc.What would be the scenario where you suggest the use of calculator?

Hi
In CAT I would advice you to use calculator as less as possible, In DI you can calculator for approximations however from past few years in DI based sets, Questions have appeared which do not involve much use of calculator .
You can check this for getting a hand on calculator : https://cracku.in/cat-onscreen-calculator