sir i have passed 12^th this year with93 % from cbse board.sir i was unable to clear the advanced exam.sir i am very dedicated towards iit and next year is my last chance sir. my dream is to pursue cse from iit delhi for which i have to be in top 100-200 in the advanced exam . iam weak in math the most in PCM please sir guide me a way to tackle mathematics and score above 100 in iit as it decide the rank help me sir waiting for ur response

Hi,

There is no need to feel low. You have one more chance and I surely you will do good.
Understand that you can not go to the exam with one weak subject. You have to do good in all 3 to score the rank that you are targetting. I can assure you that sheer hard work is waiting for you.
Strart you prepration ASAP with maths in focus. Join a good course.
Askiitians can help you with that as well. We have over dedicated 50 IITian faculty.

What I cas see that you need a good guidance and a bit of practice thats it. Do remember that JEE is all about practice weather you are inetlligent or average.