Math Magic 2019 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

Stacking Squares
in Small Boxes
(January 2019)

updated 2/9/19

Packing with
Golden Rectangles
(February 2019)

updated 2/1/19

Variable Mate Problems
(March 2019)

updated 3/17/19

Packing Rigid Polykings
(April 2019)

updated 4/1/19

Specific Touching of
1-, 2-, and 3-ominoes
(May 2019)

updated 6/25/19

Anti-, Shifted-, and Paired
Friedman Numbers
(June 2019)

updated 6/26/19

Multiplication Problems
(July 2019)

updated 7/31/19

Crossing a Pond
(August 2019)

updated 8/26/19

Uniquely Labeled Equal
Sum Planar Graphs
(September 2019)

updated 9/21/19

Square Tilings with
Adjacency Signatures
(October 2019)

updated 10/14/19

Polyomino Tilings with
Adjacency Signatures
(November 2019)

updated 11/1/19

Product-Maximizing Packings
(December 2019)

updated 12/1/19