A wisp of Lisp

Lisp is a funny looking language, with a scary deluge of parantheses. Some of you might know it as Scheme (it's different, but not very). I had loved it in college days - the Lisp questions were all like puzzles, and all you had to do to solve them was keep recursion in mind (efficiency can go to hell), and most importantly, none in my class loved it, or that's what I think - many could barely stand it. I remember a particular class test since it was probably the only one I actually enjoyed writing: it had ten questions each of which required you to write a small Lisp program that did arcane stuff like computing x power y and inserting into a list and stuff.