Exam

Hii Latha,
Hope you are doing good. Firstly, congratulations for getting qualified in JEE Mains. It depends on the branch you wish. On average in the worst case I think 35-40% in a tough paper is preferable. Please tell me the branch you wish in IIT Madras so that I could answer you accordingly.

Andhra Pradesh-EAMCET 2018 College Predictor
Use your Andhra Pradesh-EAMCET 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack
The result is based on admissions data of Andhra Pradesh-EAMCET 2017
Get resources & insights on colleges

Andhra Pradesh-EAMCET 2018 College Predictor
Use your Andhra Pradesh-EAMCET 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack
The result is based on admissions data of Andhra Pradesh-EAMCET 2017
Get resources & insights on colleges

https://www.careerindia.com/entrance-exam/comedk-uget-question-papers-e14.html.

Yes, you could get admission easily here.
Contact on official contact no of college for the right way to get admission. Don't come in contact with anyone who is asking to you to give admission in these colleges. Contact directly in the college.

Can you tell me the places you prefer and your past scores, and please answer in English so that I can guide you best?

If you are in general category, then you'll easily require more than 120 marks in JEE Mains.