Hi Aspirant

It is not easy to get into IITs doing just formulas and whatever you are saying because you need to score more than 65 and with formulas you cannot score that much .

So what you can do now is do whatever you can like formulas ,mock tests and sample paper ..etc.

Along with that prepare for aptitude and mathematics properly atleast which can help you to score atleast more than 25 and pick out high weightage two subject and study throughly which might help you to get some decent marks so that atleast you will get a college if you really want to do M.tech.

hope this helps.

all the best.