The cut offs and reservation keep on changing from year to year depending upon various factors such as intake capacity, complexity of paper, number of students applied for the college etc. It is suggested you go on official site of the NTA/college to dig the useful information from its website regarding the same for the year you want to apply in.

Use the below mentioned link to dig further information:

https://engineering.careers360.com/articles/jee-advanced-cutoff

Dear Ravi,

JEE Main

According, to previous year cut off you should score around 81 marks in JEE Main to be qualified for JEE Advanced exam in general category.

To check the cut off trend you can refer below

To get admission in NITs you should score more then 130 marks in JEE Main in general category other state quota.

Cut off marks varies as per branches as well.

To check the cut off rank you can refer below link

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

JEE Advanced

JEE Advanced maximum marks are not defined :

Maximum Marks vary every year like below:

2017- 366

2016- 372

2015 - 504

2014 - 360

So, it is difficult to predict marks as exam pattern and marks change every year but you should score more than 50% marks to get good branch in Top IITs.

To check the cut off rank you can refer below link

https://engineering.careers360.com/articles/jee-advanced-cutoff

Good Luck!!