CAT

If you're not taking any chances, you naturally appear for both to increase your range.

Hi clain39378,
The application deadline for registration is 3rd Jan 2017.
CAT is on Dec 4 2016,
XAT is on Jan 8 2017,
CMAT is on 28th Jan 2017.

Hi Vijay,
It depends on your category if general 99.8+ would be sufficient. However, percentile is not the only criteria but it is still the first step, IIMs look for overall potential and capabilities of students in selection.
All the best.

Hi Rathna,
It depends on your category if general 99.8+ would be sufficient. However, percentile is not the only criteria.IIMs look for overall performance and potential of a candidate apart from academics, there is a significant shift in the selection process from academic-centric to overall performance and capabilities of the students. I suggest you participate in extracurricular activities, competitions, tech and cultural fests and publish papers in journals.
All the best.

CAT is conducted by IIM and is a pathway to most of the top colleges of India while MAT is an exam for Tier 4 or Tier 5 colleges. MAT has GK section in exam while CAT does not have.

The chances are good, but it would also depend on your academics and qualifications.

Data interpretation and logical reasoning are the most difficult and preferred questions.

The only eligibility for CAT is to have a graduation degree or pursuing one. So I hope you are eligible for that.
PS there is a whole document on the CAT site where eligibility criteria is elaborated in detail you can refer to that for further assurance.

It might be hard for you in some colleges. But in colleges where reservation is there you might have a shot. But getting a good CAT score will boost your profile. So Yes, performing very good in CAT will definitely take you to colleges GD/PI.