CA

Yes, you can directly pursue CA-IPCC only if you have completed your graduation and you have secured an aggregate of 55% throughout in your graduation.

Yes, you can do it.

It is always worth to opt for CA. It would have the same demand until currency exists in India. Due to less pas percentage the number of people entering CA has decreased and it is hard until you clear your final exams. Once you become CA, you can earn as much as you can, but without hard work it is not possible.

None of them are easy to pursue. You can compare above courses on the basis of following conditions:
(a) Time duration
(b) The process to enrol
(c) Job opportunities
d) Career objectives
(1) PGDM or MBA
(2) CA, ICWA or CS

Yes, maths is required in CA entrance level but it is not needed in IPCC yet you can't skip numbers and few similar mathematical calculations because they are a part of accountancy, costing, financial management and taxation which are the core subjects of CA.

It's possible yet extremely difficult to manage studying for equally difficult courses like these two simultaneously.