only few months are left howcan i crack jee exam 2016

You have enough time now. Concentrate on your weak points. Try to convert them into positive one. Regarding Maths, Solve the questions regularly from any practice sets/books. Also focus on physics and chemistry in the same way. Thanks.

Keep faith in yourselves. Prepare a time table, plan proper time for basic concepts and numericals and previous year papers. Faculty of the institute and study material that you follow matters alot. Regular interaction and group study are worth while.
All the best.