Dear,

The teaching options available after B.Sc. Maths are-

1. School teaching : Do B.ed. and you can go for TGT jobs in schools. If you do B.ed. and M.Sc. you will be eligible for PGT jobs.
2. Coaching centre : There are many coaching centres for JEE Main/Advanced/Bank/Govt Jobs etc. that pays really well, so you can also opt for teaching in coaching centres.

The Non-teaching career aspects after B.Sc. Maths are-

1. Data Analyst/Data Science : After B.Sc. math, you can opt for “Masters in Data Science” and become a data analyst.
2. Business analyst : It is related to data analyst and you can also do certifications to become a Business Analyst.
3. Actuarial Science : You can do M.Sc. in Actuarial science or clear their exams. (There is an entrance exam for this)
4. Govt/Bank Po Jobs : You can prepare for various government and bank jobs as their eligibility requirement is graduation.
5. Statistics : I have seen many people opt for M.Sc. statistics and then go for statistic related jobs (not teaching) (for example, Government statistical officer)
6. MBA : You can do an MBA and opt for managerial jobs in various firms.

Hope this helps!