Febr-March 08: The Parrot sequence
Januray 2008: Strange birthdates
Oct-Nov 2007: Infinite beetle path
Aug-Sept 07: Indecisive triangle
June-July 07: Achtung... Minen!
Apr-May 07: Soccer balls
Febr-March 07: Prof Gibbus' angle
Jan 07: Triangles to square
Aug-Sept 2006: Balance problem
June-July 06: Squared strip
Apr-May 06: Intriguing probabilities
Febr-March 06: Cows & chickens
Dec 05-Jan 06: Red monad
Sept-Oct 2005: Magic star
July-Aug 05: Cheese!
May 05: Stairs to square
Febr 05: Same pieces
Sept-Oct 2004: Odd triangles
June 04: Pizza's pitfalls
May 04: Pacioli puzzle...
April 04: Inscribed rectangle
March 04: Magic 4-T's
Febr 04: A special box
Dec-Jan 04: Curvilinear shape...
Oct-Nov 2003: Same area? well...
Sept 03: Square vs rectangle
June 03: Magic bagel
Apr 03: Granitic thoughts
Feb 03: Elementary, my dear...
Jan 03: Hands-on geometry...
Oct 2002: Improbable solid...
Sept 02: Kangaroo cutting...
July-Aug 02: Shaved or not...
June 02: Rectangle to cross...
May 02: Labyrinthine ways...
Apr 02: Just numbers...
March 02: Enigmatic solid...
February 02: True false...
Dec-Jan 02: Egyptian architecture...
Nov 2001: Binary art...
Oct 01: Crank calculator...
Sept 01: A cup of T...
Aug 01: Topological problem...
July 01: Every dog has 3 tails...
June 01: Slice the cake...
May 01: Question of reflection...
April 01: Visual proof...
March 01: Diagonal of a 4D cube...
February 01: Some path problems...
Dec-Jan 01: How many squares...
Oct-Nov 2000: Syntemachion puzzle...
September 00: Leonardo's puzzle...
August 00: Drowned by numbers..
July 00: Funny tetrahedrons...
Apr-May 00: 3 smart discs in 1...
March 00: Triangular differences...
February 00: Cheeta tessellating puzzle...
Dec-Jan 00: Rhombus puzzle...
Oct-Nov 1999: Curved shapes to square...
September 99: Hexagon to disc...
August 99: Logic? Schmlogic...
July 99: Jigsaw puzzle
April 99: Minimal dissections
March 99: Permutation problem...
February 99: Another square root problem...
January 99: Less is more, a square root problem
December 98: The cunning areas
November 98: The incredible Pythagora's theorem
October 98: The multi-purpose hexagon
September 98: The impossible squarings
August 98: The irritating 9-piece puzzle