Science

Whether you have scored very good marks or not, it is completely at the discretion of the college to take admission under a university. You just need to qualify the eligibility and follow the admission process. Let's say, for a certain college under a university, if the admission is based on the merit score in 10+2, then marks would definitely take the main lead in fetching the seats for candidates.

You have to complete 12th first with subjects maths, biology, etc. Then, you can.

U P Rajarshi Tandon Open University, Allahabad does not offer M.Sc in maths. Please check the list of PG courses in the link below:
https://www.shiksha.com/university/u-p-rajarshi-tandon-open-university-Allahabad-21430/courses?ts=82775341&rf=filters&cl[]=15

It is an undergraduate course. The duration of this course is 5 years.

dear friends as per my knowledge and my opinion for getting admission in BSC in Computer Science the eligibility criteria is that you must have studied computer science aur it in your 12th standard as a compulsory subject because for BSC in computer science and you one of this subject must have been studied is the only requirement for this course with minimum 55 % thank you

As per my knowledge and my opinion, to become a professor in Government University, you can go in any of the two options, you have mentioned, as if you go for B.Tech M.Tech and then Ph.D. You are eligible for professor in University of Technology, and if you go for B.Sc M.Sc and Ph.D, then you are eligible as the subject teacher of the respective subject in which you have completed the graduation post-graduation and Ph.D.

Dear friend, as per my knowledge student of class 12th wants to do the economics honours after his 12 then he must have economics as is a compulsory subject in his 12th. Some universities also ask for mathematics as one of the subjects.
Thank you!!

There is no short cut to perform 90% in 3 or more months. You should focus on your study and keep revising your subjects and your concepts also be cleared in all subjects.

Last year, the minimum percentage was 60% to get admission in agriculture sciences.