Adviti

Career should be chosen based on three things - your interest; the opportunity to grow and your capability. Check your interests and capabilities, depending on these choose any broad area of work. For example you could be interested in research and have enough experience with the same. If you believe that you lack the ability, I think you need to try something like an internship for a short duration of time and see if it is working for you. The third factor is opportunity or growth - if you believe that there is no opportunity to grow in the long run, that is not the right field for you. Becoming a CEO depends on the company, it's culture and your work capabilities. I think you need to focus on the immediate, and bother about the rest as you go.

Mathematics is all about practice. If you have can the previous question papers, you could check the weightage of the questions from each chapter in the examination and prepare accordingly. This will help you to pass. Practice two to three types of models/variations of each question. And try to read the portion from one text book itself. Also, you might take the help of some online videos related to any topic that you are not clear about. This will strengthen your basics.