Draw a rectangle
Divide it in half
Divide the top half in half
Divide the bottom half in (somewhat equal) thirds
Now try to draw a line through ALL of the lines, without intersecting a line more than once, or crossing your line. the lines may be squiggly, straight, jagged, or any other shape or form, just as they abide by the rules. This may appear easy, but (at least to me) it's been very hard, almost to the point of annoying-I'm usually excellent at this puzzles (even the infamous 'zebra puzzle'), but this one has me boggled. I'm also not sure if it's even solvable-I have conflicting reports; one friend insists that it is not, the other (the one who showed it to me) insists that it is. I did search on the internet, but could not find any examples of it.
Note: I'm not necessarily asking for the answer-I merely want to see if other people can solve it-and how long it took them. I may come off looking like a complete fool (a week? It took me 3 minutes!) .
Feel free to post any of your favorite puzzles/brain teasers.