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!
Friday, October 12, 2007
Connecting the Dots
You have n dots on a piece of paper. How many lines do you need to connect the n dots?
The answer to this question is pretty well known, so if you want to provide the answer, please share your explanation for everyone else.