For example, a or A* of CIE Pre-AS mathematics grade, or a or A* of CIE advanced mathematics.

If you take the AP exam in America, you may not be able to accept it. But there may be an opportunity to look at the requirements of British schools.

Nowadays, many British schools recognize TOEFL, but they don't accept GRE.

AP preparatory math scores (calculus b and c, mathematical statistics b and c) should be above 4 (out of 5)

There is an international competition as a background, but its function is not as great as the above. Because the above is a hard and fast rule, it determines which credits you can take in graduate school.

Internship experience is very important, and mathematics must be applied to the financial industry.