Any of the "new math" that insists on asking absurd questions instead of presenting the standard number problems we used to get like 8+8=16. This **** goes on from the 3rd grade on up, and the math "questions" often don't make sense which just kills the point of doing it:: "it makes them think and use math like they would irl".
I don't know what common core math classes you took, but none of mine had any of this weird **** in it. Physics had weird **** but it was weird **** that made sense so it passed.
I think the original joke was just about math, not common core. What these ******* don't realize is that math is the most logical **** they'll ever come across.