I think the pressing question here is what the Anki cards contained w.r.t. these problems :-) The high school curriculum and the text books are not focused on

I think the pressing question here is what the Anki cards contained w.r.t. these problems :-) The high school curriculum and the text books are not focused on proofs or famous questions. Further, the goal of the exam is to find out your position in the normal distribution of your peers' math skills. You are not supposed to be able to beat everyone else by rote learning (so if you can do it, it's quite a hack!). I don't think ChatGPT is a good comparison, because it has obviously memorized much more than a human could, and a test to poke its strengths and weaknesses would look different.