Consider 9 dots arranged in a three by three square. Connect all these 9 points with four lines without lifting your pen from the paper.

(In reply to more difficult by Cory Taylor)

Here's how to do it with 4 lines... Take your pen and draw through abc... Then get a pen from someone else (as long as it's not YOUR pen) and draw through adg, beh, cfi, lifting it up each time. You didn't lift YOUR pen from the paper. :D

Posted by Gamer on 2003-03-08 14:55:10