Colleges in Delhi

If your aim is teaching, B.Sc and M.Sc would be surely enough for it. But if you want a decent placement and a job, you should definitely consider B.Tech. You can apply for various universities providing B.Tech degrees and then proceed.

If you have interest in Maths, then go for any Maths course.
But, if you don't have interest, then go for any specialized course which suits you best.

South Delhi Polytechnic for Women located in Lajpat Nagar offers Diploma in Food Production, which is an UG Diploma and a Full Time degree for a duration of 1 year. The total fee for this course is INR 32,000.
For more information like reviews and course highlights and other frequently answered questions click the link below
https://www.shiksha.com/hospitality-travel/culinary-arts/course/diploma-in-food-production-south-delhi-polytechnic-for-women-lajpat-nagar-214640

No, this institute doesn't provide this course, but other institutes do.
http://nimtweb.org/CD/IBBAAVI-BBA-Aviation-475
http://www.cce.upes.ac.in/program.aspx?mpgid=20&pgidtrail=20&levelid=11

Refer the link for the same: https://admissions.jnu.ac.in/searchquestionpaper.aspx. You can also buy Arihant books for previous year papers.

Both (DTU as well as BITS) are best but in my opinion, DTU is good because it is a government institution with good quality of faculty members and good placement record.

Yes, you can go for it studies and dreams have no limit! You just have to fill the gap form in university!
All the best for your bright future!

For every couse, there is a different criteria but most of them have 60% criteria!
All the best for your bright future!

Jamia Milia Islamia has a wide number of departments and centers, therefore, a big number of courses on offer. You can come to Jamia Milia Islamia only, when you are eligible to be admitted. By eligibility, I also mean that you need to qualify an entrance and an interview (for some courses). It is a reputed university so the competition to get in is little tough. All the best.

Eligibility-
BA (Hons.)/ BA under at least 10+2+3 pattern securing a minimum of 50% marks in the aggregate including all subjects studied at B.A. level. The subject in which admission is sought must be a Hons. Subject at BA (Hons.) level/subject studied in all the three parts at BA level.
Entrance Exam -
Admissions are made through an Entrance Examination Postgraduate Entrance Test (PET) generally conducted between May/June every year. Notification for the Entrance Examination will be generally released during February every year.