Dear aspirant,

As far as cse branch is concerned in top 3 NITs you should aim for 99.7+ percentile as you would be on safer side because every year the cut off varies.

Coming to your second part of question , the marks needed to score in jee mains 2021 a percentile of 99.7+ can't be predicted as the quality of students which appear in a particular shift varies.

But in general you need to score a 250+ atleast to get a rank within that cut offs.

For more information,you can check out this link -

https://engineering.careers360.com/articles/jee-main-cutoff-for-nit-surathkal

Hi

It is difficult to predict the marks  required to get a 99.7 percentile

This is because,
Marks required vs percentile  keeps changing every year  depending upon various factors like  number of students that appeared in the exam, kind of marks obtained by them , toughness level of the examination for different shifts of the exam etc

But  yes when we go through previous year trends then,
To get 99.7 percentile you need atleast around 201 marks.

You can check the same at our page the link  is provided below

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Now, limited time is left for jee mains 2021 , so focus on your preparation, to prepare well your jee examination, go through chapters first and your focus should be on grasping concepts , practising questions and then revising them, go through mock test paper sample papers and previous year question papers as it will let you know your preparation level and and weak areas so that you can work on them and perform well in your examination.

If you have any other doubt then you can always reach us to clear them :) we are always available to help you out and guide you

Thankyou