Hello aspirant,

In advance I congratulate at prelims score you are going to expect and your confidence. You had a  good attempt. Expecting 85/100 is a big success. Please don't discourage yourself. You have the enough ability to crack the Mains too. Try to work hard more than your prelims. Set a timetable. Solve as many problems you can. Refer all the previous papers of the exam. Shortlist the important topics and the frequent repetition of questions and solve  them. It all depends upon the amount of hard work given. Work hard for the better result.

Hope you a good luck.

Thank you.