dear student,

For honours degree in any subject you have to complete 48 credits in that particular subject (which is Maths in your case).

Every subjects has different modules to choose from with 4 or 8 credits assigned to them.

You can give exams of Foundation Subjects like FST-01 or BSHF-101 or languages within 6 months of admission, for example- if you get enrolled in June 2018, then you can give exams for foundation course subjects in December 2018.