Math Magic 2009 Archive
Tiling Reptiles Packing Squares Circles Covering Touching Graphs Numbers Digits Matrices Chess Games Other
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020

Chess Pieces and
Polyominoes
(January 2009)

updated 8/10/15

Describing Letters
With Phrases
(February 2009)

updated 1/6/11

Polyomino Letterforms
(March 2009)

updated 3/1/09

Pandigital Factoring
(April 2009)

updated 4/1/09

Rotating Rectangles in Boxes
(May 2009)

updated 5/22/09

More Tiling Problems
(June 2009)

updated 4/10/16

Weightominoes
(July 2009)

updated 7/31/09

Multiplicative Grids
(August 2009)

updated 8/1/09

Unique Rectangle Packings
(September 2009)

updated 9/26/09

3-Colored Plane Tilings
(October 2009)

updated 2/16/10

The Elevator Problem
(November 2009)

updated 11/13/09

32 + 42 = 52
(December 2009)

updated 12/24/09