University is about a rounded education not just memorising text books - even more so in the USA with 4 year courses and major /minor.
As someone said its passing the airport test - high school should make this clear to students just be thank full its not like the UK when until fairly recently you had to have done Latin at school to get into Oxbridge
My point is to give but one concrete example of some trivial cultural knowledge that was actually required in a real mathematical test, which some people (like you, for example) assume everyone knows the answer to, but that other people (like 9-year-old me, for example) don't, which could cause someone to fail to understand a mathematical question which they were otherwise capable of answering.
I learned a lot about software development from my Gesture Drawing and Rock Carving classes at university (they complemented each other: one was additive, the other subtractive). Gesture Drawing taught me to get something bold and energetic down immediately that captures the overall flow, then iterate quickly and fluidly to incrementally refine it. Rock carving taught me to imagine something hidden deep inside that's solid and tangible, and keep chipping away at it with little nicks and scratches over a long period of time, until it finally reveals itself and becomes smoothly polished.
(And the comment about "scrum" was a joke. Can you imagine a team of rugby players standing up together in front of a dry-erase board before a game, sticking post-it-notes with user stories about tackling and passing scribbled onto them? Isn't that how it works?)
The question I couldn't understand discriminated as much against girls who don't give a shit about baseball as it did nerds who don't give a shit about baseball.