I got the same feeling when taking timed tests in some of the more proof heavy CS classes. In a lot of ways it felt like solving crossword puzzles for a grade

I got the same feeling when taking timed tests in some of the more proof heavy CS classes. In a lot of ways it felt like solving crossword puzzles for a grade with a timer ticking down. Frequently I'd spend the most of the test with no idea what to do, and then about 20 minutes before time was up, I'd have an insight and I'd spend the last 15 minutes furiously racing to write it all down. This worked out well and I ended up with a 4.0 program GPA, but I was a wreck every test day--I was always convinced that this was the day I'd fail to have that last minute epiphany. I was always looking for a more systematic approach, but I never found one. In the end I still don't know if the problem was me or the tests.