[afafsd]

One maths class we were only warned that we had to use Euclidean paper.

I did great in exams with cheat sheets, but poorly in the few truly "open book" exams, because I didn't know how to properly prepare for an open book exam. My silly undergrad brain thought "Woohoo, open book, I guess I don't have to study all this stuff, I can just look it up when I get there" which led to two hours of feverishly flipping back and forth in the book.

[WalterBright]

Yeah, big mistake thinking open book means one doesn't have to study. I know only one guy (Hal Finney) who could learn the material during an exam :-) As I wrote elsewhere, Hal was one scary smart dude.