Math Magic Numbers 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

Palindrome Products
(June 1999)

updated 10/12/17

Power Products
(December 2000)

updated 12/14/00

Getting to Two
(May 2001)

updated 7/1/09

Printer Errors
(June 2001)

updated 2/23/17

Square Root Approximations
(May 2002)

updated 5/18/02

Honest Numbers
(December 2003)

updated 1/10/04

Number Constellations
(February 2004)

updated 3/8/04

Strobogrammatic
Expressions
(April 2004)

updated 4/23/06

Repeating Blocks
in Squares
(October 2004)

updated 10/31/04

Ambiguous Products
(January 2005)

updated 1/31/05

Substring Iteration
(November 2007)

updated 11/13/07

Mathematical Anagrams
(October 2008)

updated 6/6/10

Base Printer Errors
(May 2010)

updated 6/26/10

Square Sum Sets
(October 2010)

updated 10/13/10

Iterating Two Functions
(May 2011)

updated 5/17/11

Far Away Dice
(September 2011)

updated 9/1/11

Binomial Trivia
(October 2011)

updated 10/1/11

Equal Expressions from
Consecutive Numbers
(July 2015)

updated 7/1/15

Number Names
(May 2016)

updated 5/19/16

Repeating Flash Cards
(August 2016)

updated 8/26/16

Langford List
Generalizations
(January 2017)

updated 1/1/17

Close Prime Signatures
(February 2018)

updated 2/20/18

Primorial Problems
(March 2018)

updated 3/1/18

Leaky Pitcher Problem
(March 2020)

updated 3/1/20