CA

First of the all, basic maths is needed each and everywhere in life. And when coming to advanced maths like integration and all. They are mostly useful in CPT and somewhat in final. Being strong at maths is surely going to help you in costing and financial management as well as accounts.
Maths may not be as much needed when you pursue your CA course but once when you are done with CA and you want to join some field like investment banking, stock market, portfolio manager, financial analyst, etc., you will understand the dire importance of advanced maths. Many leave up maths in CPT thinking that the other subjects will set off it.
One thing I want to say to each and everyone pursuing CA, please do not study just to pass, do not mug up the concepts, understand them and practically apply them in life. You might fail once or twice in the exam (chances of which are also very less due to concepts being crystal clear), but you will never fail when you go out there in the cut-throat competitive world.
So, yes maths too is important, not that much but yes, it is.

Hi,
Well, I would say that both are very different.
1. CA is a professional degree which if accompanied with graduation and Masters offers value added services. Whereas I.A.S is civil services, and to sit for the same, graduation in any discipline is must.
2. CA offers jobs in both public and private sector while civil services are only offered at government level.
3. Canada, New Zealand, Australia are three top recruiters of accountants (you need to sit for a few exams) while there is no option of getting posted abroad as an I.A.S officer.
So, you may take up a graduation of 3 years in relevant field of commerce, go for CA also side by side and then further you may take up civil service (age limit is 21-30 years). Make sure once you are done with the article ship, then you go for writing the exam.
There are companies in India hiring large number of CA professionals. To name a few, I can suggest you with Ernst & Young, HSBC Bank, ICICI Prudential, Om Kotak Mahindra, Birla Sun-Life, Tata AIF Life, Reliance, HDFC Standard Life, Max New York Life, Banks like SBI, HSBC, Bureau of Public Enterprises, government financial institutions and stock exchanges, universities, etc
While IAS joins the state administration at the divisional level, as a sub-magistrate, and looks after law and order, general administration and development work in the area under his charge.
Feel free to revert. In case it resolves, appreciate by liking it or marking as best.
All the best.