Took AP calc 1 in high school, got an A in the class and a 5 on the AP test which meant I didn't have to take the course in college, ended up taking calc 2 a year later, so I had relearn everything and catch up. I struggled through the whole semester but ended up passing with a c.
Between calc 2 and chemistry, the hardest 2 classes I've took in college
I took AP calc in high school, too, but I knew I wouldn't pass the test, so I took it again in college...without question the easiest class I took in college.
Probability and Statistics was the hardest math class I took. The math wasn't too hard, but the way they worded the questions was always so confusing.
The hardest class I took, period was a physics class. I can't even remember the name of it. It was like Quantum Mechanics, but it wasn't Quantum Mechanics (which I had no problem with). I just remember this class was all Greek symbols, no numbers, and the professor had terrible handwriting