Maths Spl

This link should give an idea:
https://www.shiksha.com/resources/college-comparison-51912-51570.

Hello there,
Both are carrying good scope in their respective field. Its up to you what you like more engineering or B.Sc Maths. Engineering is creative application of Science maths, innovations design, construction operation of machines, etc. And B.Sc. Maths is a undergraduate programme related to maths and its applications. After B.Sc, you can go for software, insurance, market research banking sector etc., and for government sector, you can opt out Tax assistant, statistical investigator, IES, teacher, etc.
Regards.

You probably can. As eligibility criteria is decided by the university itself and it can be different for different colleges. So, check with the college for this.

Mathematics has some scope in government sector mostly. There are several options for a Maths Graduate like Teacher or Professor after giving NET exam. Junior researcher in various Indian research institutes like DRDO, ISRO, BARC etc.

Yes, why not. You are eligible for MCA. The requirement for doing MCA is you have done BCA before.

You can pursue B.Sc. Maths from IGNOU. Visit IGNOUs official website and find your local study center.

These are do or die chapters in mathematics. Limits, continuity & differentiability. Application of derivatives. Definite integration.
3-D geometry. Sequence & Series. Probability. Straight lines. Circles. Matrices. Complex numbers.

Don't stress out too much. Choose what you are comfortable with. Select a subject that you like and are interested in. If you are asking for opinion then I would suggest choosing social studies because it contains history and that doesn't change with syllabus.