CAT

Refer this link for percentile required in IIM's https://www.shiksha.com/minimum-cat-2015-percentile-required-for-admissions-at-iims-article-11265-1

As per last year, all India quota cutoff is 99.2 percentile. All the exams except MBA CET comes under all India quota.
I hope this answers your question.

NICMAR accepts students via its own exam, NCAT. The CAT score is not used as a deciding factor. Having a CAT score above 75 percentile gives you an edge in the interview . Good luck.

yes ,but you should score minimum 95 percentile
Also every institute has different cut off

There is no fixed answer for this as there are a lot of factors that determine your chances of getting into IIMA. IIMA usually prepares composite score which assigns different weights to your 10th, 12th and UG marks and also CAT Percentile. With 65% and 71% you are seriously disadvantaged in 10th and 12th, hence you will have to make sure that you get really good CAT percentile. If I have to guess, I would tell you to score more than 99.8 percentile. SO prepare really well and give your best shot at CAT.

If you put your heart & soul in preparation for next four moths and your basics are good you will be able to score well in MBA entrance exams.

Hi Bishal,
CAT exam tests the skills of the aspirant in four main sections: Quantitative Aptitude, Verbal Ability, Logical & Analytical Reasoning and Data Interpretation. It is also a test of time management.
Kindly refer the below link for more details :
https://www.shiksha.com/mba/exam/cat/syllabus
Hope this information helps. Please feel free to revert.
Wish you luck.

Hi Apoorv, you can appear for september MAT and CAT. It will be good if you take admission after fighting a management entrance exam. You still have time. Do not drop. All the best.

Hi Vishal,
CAT and MAT is compulsory to get admission in any college.
Apart from that, you can also appear in other management entrance exams like ATMA, CMAT, etc.
All the best.