Math... I will always admire people like Ridseard (and Ants) who can do it well. I barely made it through Algebra. It was very frustrating. For example, in highschool, my tutor would show me how to factor. I would understand it perfectly for a moment. Then when I tried to do it on my own I would be completely unable. Even if it was like 2 minutes after it was shown to me. I would probably be in the same camp as Emmline.
Well...there's math competence, ie, the ability to compute change, figure tips, solve basic geometric/algebraic type problems...as pass as much hs/college math as is necessary. I'm there. Then there's math fluency, which is, I believe, a comfort level with numbers and formulae similar to the comfort level I have with words and language. I do math by translating it into visual images...this often involves writing things down so I don't drop them from my head, then computing, then re-translating into numerals...a lengthy clunky process. Good mathematicians can think in numbers.