Hello Laila! I am sorry that your question isn't clear. If your referring to B.Sc Mathematics, you don't require your JEE Mains marks. Your 12th marks are enough for being eligible for the course. The college you have selected might conduct entrance exam which includes basic HSC mathematics and aptitude questions, to test your capabilities.

BSCE is a different course called Bachelor of Science in Civil Engineering, which is available only at international universities and not in India.

Hope this helps! Kindly drop in your doubts in the comments section.