Hello dear, 

To take admission in bsc mathematics, the eligibility goes as follows: 

• The candidate must have passed 10+2 or equivalent examination from a recognised board in science stream with a minimim of 50% marks in maths/ or in aggregate.
• Some universities and institutes also conduct the entance exam. The admission in these universities is based on final merit that is marks in 12th and entrance exam. 

Please specify the college name so that i can provide you with exact admission process and details. 

All the best!