What’s in a maths-based degree?
Even if you know that you would like to do something related to maths, you still have to decide exactly what kind of degree it should be. Straight maths? Statistics? Or maybe a joint degree like maths and computing or maths and finance?
To make an informed choice you need to know what is being taught in a typical maths degree and what it is used for. Have a look at this page on the Maths Careers website via the link below to look at the main subject areas within maths, and describe what they are about and what kind of careers make use of them.