An angle is not a point by any means... your question is unclear but its answer would be the angle's vertex, I think. You should also specify that you talk about a set in the discrete question. Maybe you could accept "mathematical analysis" for calculus.
8! Pretty good for someone who's only taken a partial grade eleven math course. We always use BEDMAS, not PEMDAS. Out of curiosity what does the P stand for?
Your definition of discrete seems to be wrong, discrete means that a set of data can only take certain values (e.g. integers), numbers in the data set could all be the same number and could still be discrete. Good quiz though, one of the few maths quizzes on here that actually tests maths knowledge past basic arithmetic.