B.Sc compared to other degrees in science is easier but you should have a good understanding of science and maths. Both type of questions be it theory or numerical will come under B.Sc whether it is an entrance exam or general syllabus.

See BSc is a basic level course designed for students in such a way that every student can complete it. It's not a hard but at same time not easy so that you might pass exams by studying for a day.

Undergraduate courses are made according to average ability of student to clear it. You need not worry  ,just study with all your heart and see the results,

In the exams there is a mixture of both theory & numerical so that you will be assessed on both theory as well as practical and application based knowledge.

Exams test your application skills so it must include numericals.

Its comparitively easy than other science courses like engineering and medical.

So Go for BSc & All the Best