The eligibilty criteria for JEE mains clearly specifies 3 attempts whereas for JEE Advanced you are allowed to take two consecutive attemptsonly.

You need valid JEE mains score to qualify for JEE advanced and minimum of 75% aggregated marks in Class 12th with all five subjects into consideration for general

Yes definitely, you are eligible for all NITs as they accept only JEE Mains. moreover, you are eligible to all IIITs and Government funded Institutes as well with JEE mAIN.

The major differences between both exams have been shared below to clear your doubts.

https://engineering.careers360.com/articles/how-jee-advanced-different-from-jee-main

For most coveted IITs ,

JEE Advanced maximum 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.

You can check the cut off JEE Advanced by the given

JEE advanced is ighly objective exam with MCQs and requires speed and accuracy.

Hence, it is advisable to join coaching institutes like PACE, Resonance,Allen kota, Rao, AKash which are pioneers in education industry.

Secondly, if you dont wish to join so, you need indepth preparation from books like NCERT to

JEE Advanced maximum 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

You can check the IIT Kanpur cut off from the given below link

Cut off also varies according to category and branches wise

IIT Kanpur cut off

Good luck!!

For NITs, only JEE mains is accepted, and the cutoffs close down to 10,000 rank for JEE MAIN and hence beyond such ranksyou have less chances to make through.

For IIts, you need to also appear for JEE advanced alongwith JEE mains.

For all top IITs like Madras, kharagpur, bombay,

Yes, you need to qualify for JEE mains 2018 and secure ranks amongst top 2.24 lakh students for qualificatiom into JEE advanced 2018 with age to be born on or after October 1st, 1993.

The candidate must have passed 12th exam with minimum 75% aggregate marks or shall be under

JEE advanced examination 2018 shall be conducted only via computer mode, to check the entire sylabus please refer below official link:

https://www.jeeadv.ac.in/Syllabus.html

You can get analysis of 2017 paper to know more about syallabus and weightage each chapter has been given in last years paper:

https://engineering.careers360.com/articles/jee-advanced-exam-analysis

Moreover, You can refert