It's not a homework help question, but it's somewhat related, and doesn't have a better sub-forum: how do you guys/gals remember all the intricacies of mathematics so well that you can help people like me? I ask this because, like many people, I've done it all before, but when I pour over the questions asked in homework help, I draw a blank. I practiced these things for many, MANY hours, and had it down well, but years later I see these same questions, and say, "I understand what's asked, but I forget how to find the answer." This is making the assumption most of you have left college/university by now, and surely we have a much different background, but it amazes me you retain these things. My physics instructor, great man, was in charge of the mathematics faculty of my college, and while he could certainly explain basic algebra and trigonometry - the latter being a rare question for him - when I asked questions about things I assume are a bit obscure in mathematics (synthetic division, and whatnot, which I forget) he would say, "It has been so long, I forget how to do it." It's not that he didn't know mathematics, but he seemed to forget "lesser" mathematics, if that makes sense. The fact that you guys/gals remember things I don't isn't surprising in any way - I'm not a mathematician or physicist by any stretch of the imagination - but I'm extremely interested in how you all manage to retain this knowledge, and I'll admit, I'm quite jealous.