You've seen it a million times, in puzzle books, video games, or even children's toys, and you've probably solved it a million times. You may have even made one if you've taken a computer programming course. It's the humble Stock Puzzle, a boon to anybody who can't be bothered to come up with an original puzzle. At least one of these puzzles always seem to pop up in situations where Only Smart [...] [tvtropes.org]