pilowsky, on 2021-April-29, 18:30, said:

There's also a change over time.

I was at the end of my school career in 1983 where I did double maths A level (and study beyond that to do the Cambridge entrance exam), I graduated nearly 30 years later in what was effectively applied maths/stats. The second year of my degree was less tough and rigorous than my final year at school (and I was able to verify this as it appears I forgot to return one of the school textbooks, the third year of the degree was a big step up from the second). When you try to answer a question in some 3rd year coursework using the wrong technique and get the solution out, to get a comment from the tutor to the effect that you'd done a truly epic feat of integration well beyond the scope of this degree by doing something that was entirely routine at A level ...

I used to attend a study weekend where you got to chat informally with some of the tutors, and they pretty much all said that they could no longer set questions they set even 10 years before as they'd be much too hard for current students.