I contributed the following columns to the Gazette of the Australian Mathematical Society from September 2004 to November 2009.

MATHELLANEOUS
The mathematics of voting - September 2004 (PDF)
Art gallery theorems - November 2004 (PDF)
A mathemagical card trick - March 2005 (PDF)
Unsolved problems for young and old - May 2005 (PDF)
How to win at tic-tac-toe - July 2005 (PDF)
The joy of SET - September 2005 (PDF)
The art of tiling with rectangles - November 2005 (PDF)
Constant curiosity - March 2006 (PDF)
Scissors congruence and Hilbert's third problem - May 2006 (PDF)
Communicating with eyes, hats and light bulbs - July 2006 (PDF)
More unsolved problems for young and old - September 2006 (PDF)
Party problems and Ramsey theory - November 2006 (PDF)

PUZZLE CORNER PC 1 - March 2007 (PDF) PC 2 - May 2007 (PDF) PC 3 - July 2007 (PDF) PC 4 - September 2007 (PDF) PC 5 - November 2007 (PDF)

PC 6 - March 2008 (PDF) PC 7 - May 2008 (PDF) PC 8 - July 2008 (PDF) PC 9 - September 2008 (PDF) PC 10 - November 2008 (PDF)

PC 11 - March 2009 (PDF) PC 12 - May 2009 (PDF) PC 13 - July 2009 (PDF) PC 14 - September 2009 (PDF) PC 15 - November 2009 (PDF)