This rank predictor will works for those students who have scored more then 150 marks in JEE Main 2013 exam. you can check your rank as per below table. On left side you will get predictable rank as per your right hand side marks.
for example:- if your jee main score is more then 300 then you will get rank between 1-100 [predictable rank] and goes on.
Rank Predictor JEE (Main) 2013 - JEEmain.nic.in
|JEE Main Marks|
More than 300
You can predict the rank by the rank only. all you have to do is just cross check the rank by marks of jee main. you can also download the answer key of JEE Main from this link or from the official website of JEE Main 2013.
All the best to all the students of JEE main, hope all the best students will get chance for JEE Advance entrance exam.