I am interested in drawing ,designs,and in subject mathematics what are the courses for this after 12 pass

Hii Kartik..

Considering your interest in mathematics,  drawing and designing the best course I would prefer to you is either B.Arch. Architecture is a mix of art, science, math and business so it requires you to have a robust background in a variety of subjects. It also requires a five-year course of study rather than the standard four years for an undergraduate degree. After B.Arch you can also do your masters in architecture doing M.Arch.

I am providing you the list of top 10 architecture colleges in India-

• School Of Planning And Architecture, Delhi
• Indian Institute Of Technology, Kharagpur
• Sir J. J. College Of Architecture, Mumbai
• Birla Institute Of Technology, Mesra
• Jadavpur University, Kolkata
• Chandigarh College Of Architecture, Chandigarh
• Jamia Milia Islamia University
• National Institute Of Technology, Tiruchirapalli
• Center for Environmental Planning and Technology University, Ahmedabad
• IIT Roorkie

Hope this helps.

Best of luck for future..

Hello Dear aspirant,
Hope you are doing well!!

CONGRATULATIONS FOR PASSING 12TH WITH FLYING COLOURS!!
As you are interested in drawing and designing you can go for NIFT or architecture. There is lot of scope in these field.
Hope this answer will help you :)
Best of luck!!