MAT

Yes, PUMBA accepts MAT score for admission in this course.

HI!
For MAT you can refer- https://www.shiksha.com/mba/articles/mat-exam-centres-blogId-19759
For ATMA you can refer-https://www.shiksha.com/mba/articles/atma-2018-admit-card-test-centres-blogId-14971.

Yes, the placements in GBS are good every year and this year around 100 students got placed within 45 days with an average package of 5 lacs per annum. All the students got placed in good and reputed companies like Amazon, Nestle, Dabur, Asian Paints, Berger Paints, TATA Motors, Axis, ICICI, Bajaj Corp., Aditya Birla Groups, Future Groups, Reliance Trends, etc.

BIMM Pune is a good B-school. You can definitely consider this option as ROI and placement records are great here. Best colleges where you can apply:
1. BIMM
2. ISBM
3. DY Patil
4. ISBS etc.

It seems as if this college provides admission only on CMAT basis.

The main and only difference comes in the free structure. TANCET candidates will pay just 5-6 Lacs where as MAT candidates will have to pay around 10-11 Lacs for the entire course.

KIIT is known for it's MBA programme all over the country. The complete process involves 3 steps, first of all you need to apply and give the entrance test which is conducted by KIIT. Once you clear the test, you will have to appear for GD and PI round. The application fee is Rs 1200. But, as far as I know the admission process for this year is almost done.

Hello!
Except for the CAT (which provides an On-screen calculator), None of the other entrance exams permit the use of a calculator while giving the test.