I am aiming to score 85%ile in CAT and then reappear next year as I am in my second year of college, What all topics should I cover in the last 3 days to score around 85%ile in CAT. I know this question might seem a bit weird but My main aim is CAT 22. I want to give it this year just to get a jist of the exam and I want to score above 80%ile. What should I do, I have 3 days in hand.

just chill

very nice bro , ill give you a suggestion .
while you'r in the exam hall observe and analyse , this will greatly help you overcome the my issue we first times face .
paea summaries are the easiest of all in va section rc are easier to scoore and then at last odd one out and para jumbles .
in quants .thats your call , di ... you leave it , arrangement and puzzels and arrangement puzzels !!! thats it

Hi
Just go and appear for the exam and enjoy the exam .After the exam you will realize where you stand without any prior preparation and then you can make a fair idea about how you should approach CAT 2022.

Generally 3 days are very few. But as you will appear next year and youre seeking for an answer, Only do the basics of Profit Loss(imprtant), Ratio proportion and Weighted averages. :) Just basics.