re: What's the hardest class you took in college.

Circuits I

Prof was trying to weed out students. He actually had an unsolvable question on one exam. When called on it, he said we could've added a resistor and then taken the limit on it to solve.

We were pissed! Who knew you could just change test questions?

I encountered a difficult transistor in another course two years later and thought, what the heck? So I added a resistor, took the limit and got the question right. Prof (not the same guy) said smart move. My buddies were not impressed. Girls hold grudges lol