Is maths necessary for pursuing CA?

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.

I can say the subject account is necessary for becoming CA.

Yeah it is possible but you will find CPT maths really tough if you skip it in your 11th and 12th. Stuff like limits, derivatives, integration, probability and all will be completely new to you and then to grasp it all in a period of 2 to 2.5 months after your 12th and before your CPT, along with ac

yes... maths must necessary..... for CA

yes ofcourse nothing more then maths in CA

I would not say it to be necessary in technical sense but yes definitely important.