Some fun problems.

The intent of these problems is to make you think; to make you use your imagination!

Where is the missing square? (Click to enlarge.)

Which way is the bicycle going?  (Click to enlarge.)

Whats happening here? (Click for more information.)

Which way does the bike move?  (Click for more information.)

Cut the Knot: Some neat Mathematical applets

Here is the four dimensional  hypercube.

 Problem of the Week  from Macalester College