Indian Statistical Institute, Bangalore

No, ISI Kolkata does not offer B.Sc Mathematics program online.
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You can check the link to get information about the same
https://www.shiksha.com/exams/isi-admission-test/syllabus
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Admit Card: The Admit card of ISI 2019 will be download from the Official websites:www.isical.ac.in
How to download
For the Registration of the Admit card Candidates can visit over the link provided above. First of all, Candidates have to enter their User name along with their Password. After that Candidates can Sign in for their Admit card. Click the link and download the ISI Admit Card 2019. Good luck.

Eligibility: In order to be eligible for admission to this programme, an applicant must have. A three year Bachelor's degree in Mathematics, or. A BE/B Tech Degree, with Mathematics as a subject, or. AB Stat degree from ISI. Good luck.

Theoretical and Applied Computer Science courses are more advanced in CMI compared to ISI. But, at least the computer Science course structure at CMI is very well organized. So, I will conclude my answer by saying that if you are not from Olympiad background then Maths is a better option for you. Good luck.

You can check the Shiksha link to get all information about Techno University
https://www.shiksha.com/university/techno-india-university-Kolkata-38061/courses/bsc-bc
Good luck.

Viva Bharati University is a university with national importance, so definitely it's class is quite high. If you see the statistics department here, it is of excellent level contrary to similar type of universities. Good luck.

Hello Sachin
I suggest you to use the Shikshas predictor tool for more information and this will help you to predict the college according to your choice rank or percentile visit this link:-https://www.shiksha.com/college-predictor
Good Luck.

No nothing like that the paper is not that difficult just fill the form and give the paper along with the class 12th and if you don't get into my side then now in for other colleges the many other colleges for B stats is well and you can definitely go in ISI in your Masters.