What is the minimum number of strokes to reproduce the drawing below without lifting up the pencil from the paper (no tricks at all), and without passing over a line segment (or part of it) already drawn? You may begin and end wherever you like, and line segments may cross each other, but only as intersections.

Note: a new stroke occurs when a line type ceased because you have to stop and change direction.

(In reply to re(2): Improved solution...is bogus by Tristan)

I like problems with nice graphics, like this one, don't you?

It would be nice to see graphics for http://perplexus.info/show.php?pid=3077 .

Posted by Mindy Rodriguez on 2005-11-25 21:45:06