Hello

Yes you can go for MCA after completing bcs (maths). If you have a good knowledge in programming and software related thing then it will help you out while pursuing MCA.

MCA is a practical course which requires a lot of practice.  Choose some good college which will provide you good knowledge, placement, industrial experience and flexible curriculum. So that you get a software engineer job in a good company. Some of the good college are ; pune university, jnu Delhi, vit university TAMIL nadu,LPU,Anna university..

Good Luck.