I'm posting one puzzle, riddle, math, or statistical problem a day. Try to answer each one and post your answers in the comments section. I'll post the answer the next day. Even if you have the same answer as someone else, feel free to put up your answer, too!
Tuesday, October 30, 2007
Look Behind You
Though in theory I am always behind you, I am also around to remind you. But in case it's your way to give me too much say, I can hamper or, even worse, blind you. What am I?