in college calc classes, my handwriting was famously quite poor. I'd scribble down some illegible notes and formulas, draw a few pictures illustrating the problem, then come up with a random answer. most of my classes graded work, not correct answers, so if I had an inkling of the right way to do it I could fake it and usually get at least 75% credit for the question.

always hated the questions that make you use the answer from previous questions. always a good time when you get to the end and have a nonsensical answer and have to redo 4 pages to find where you forgot to carry a 1.