Puncture repair kits have instructions on them so you wasted your time posting this. Only joking. Too true, i hate Pythagoras, although it's easy, and i hate trigonometry... I've always said that things we learn in school are absolutely bloomin' useless unless we go into speciciality jobs, i hate the way schools teach and i hate everything at this stage in life. Why the hell do we need to learn about how plants work in science, WHY??? Dick and head springs to mind, we're all going to be useless twats with loads of useful (less) knowledge in later life. It's so annoying how, as you've said, we spend like 100+ hours learning bloody trigonometry and Pythagoras solving simulataneus equations by inverted f**kwits, why the heck do we need to know all this useless tosh? Rant over for now, excuse the French, and good topic, but will get closed at around page 6 due to people getting worked up about it...