Math Magic Matrix 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

Divisor Chains
(November 1998)

updated 4/23/19

Average Arrays
(March 1999)

updated 3/7/99

Square Matrices
(September 1999)

updated 10/5/99

Square Crosswords
(January 2002)

updated 1/27/02

Modular Sum Matrices
(February 2002)

updated 1/5/03

Sum-Product Matrices
(November 2002)

updated 11/20/02

Multiple Matrices
(June 2003)

updated 6/21/03

Power Towers
(October 2003)

updated 10/26/03

Digit Isogrids
(May 2004)

updated 5/25/04

Multiplicative Grids
(August 2009)

updated 8/1/09

Powerful Matrices
(June 2011)

updated 8/6/13

Increasing and Decreasing
Prime Grids
(February 2014)

updated 2/23/14

Polyform Floes
(April 2016)

updated 4/1/16

Equal Numbers of
Adjacency Numbers
(December 2016)

updated 12/19/16

Average Lattice Sets
(July 2017)

updated 7/25/17

Sum-Product Polyominoes
(October 2018)

updated 10/1/18