Over the years, certain problems/puzzles have given me special pleasure because of their originality or profundity.  They are included here simply to communicate them to others for their pleasure and are not in any way intended to be original with this site -- most of them are old classics.  But be warned: some of them have simple solutions (once you see them) but some of them are more difficult.  They are segregated into categories accordingly.

Relatively Simple

  1. The Bear

  2. Thinking Outside the Box

  3. A Problem in Observational Geometry

More Difficult or Complex

  1. Weighing Pennies, or The Counterfeit Coin Problem


  1. The Snowplow