CAT

Most MBA colleges allot admission in MBA based on open test scores. Many institutes also conduct their own tests so you can explore institutes that allot admission based on other open tests than CAT and seek admission.

Percentile depends on the scores of all the candidates who have appeared for CAT and how can any one say how many questions will be answered by any one? Of course if you want 100 percentile there is one surest way. Answer all the questions correctly.
And by the way what purpose will be served by knowing the answer to your question? For example if I were to tell you just answering 28 out of 50 is enough to get 99 percentile will you stop answering once you've answered 28 questions,. .

Please mention the reason why you are not eligible for CAT so that we can understand your problem. Definitely you can get top and good colleges for MBA on the basis of other exams like MAT CMAT XAT CETs and many more on the basis of that exams scores you were get admission in lots of good colleges in India.

Hello Sir,
That fully depends on your work experience background. If you have a great work experience, it will come in handy to get a new job in the field of management.
I wish you all the very best.

They may not ask you to give CAT to get admission there, but almost every college in India accepts CAT score as eligibility to get admission in their college. So, to go with CAT will always give you an advantage.
Good luck.

Yes, you are fully eligible to give entrance exam CAT. But, for the entrance exam you have to prepare well. Check out the latest syllabus of CAT.

Yes, you can complete the course. IGNOU course is an open course, and can be done from home. So, I think you can join IGNOU for pursuing B.Sc.

Yes, you will get. And, JIMS is very good college for the quality education.

Yes, you can get admission for MBA after doing B.Com, but the procedure depends on college.

It may be depending upon the cutoff and the score that you have secured. It varies from year to year maybe you should check previous years admission stats. They will give you a fair idea.