Sam Loyd's "Trick Donkeys" is one of the most elegant puzzles ever invented, and if you've never seen it before, I urge you to give it a shot. Click on the image to the left, print out the page, and cut the figure into three parts along the solid lines. Now, position the strip onto the other two pieces so that it looks like each jockey is riding a donkey. Folding is not allowed.

This puzzle was created by one of America's greatest puzzlists, Sam Lloyd (1844 -1911). Loyd sold his puzzle to P. T. Barnum, who marketed it as "P. T. Barnum's Trick Mules." It was printed on a card to be cut into the three pieces. Millions of the cards were sold, and supposedly Loyd earned a fortune -- $10.000 -- in just a few weeks.

Don't give up -- the solution is really quite simple! If you must, you can see the answer here.