Puzzles

67 entries

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• A Dozen Hat Problems
  • Published in 2009
  • Added on 2016-04-12
• A Fresh Look at Peg Solitaire
  • Published in 2007
  • Added on 2014-08-26
• A Hamiltonian circuit for Rubik's Cube
  • Published in 2012
  • Added on 2012-09-04
• A Line of Sages
  • Published in 2013
  • Added on 2013-06-20
• A Puzzle for Pirates
  • Published in 1999
  • Added on 2018-04-03
• A Smaller Sleeping Bag For A Baby Snake
  • Published in 1998
  • Added on 2013-03-20
• An unusual cubic representation problem
  • Published in 2014
  • Added on 2017-08-07
• Baron Munchhausen Redeems Himself : Bounds for a Coin-Weighing Puzzle Background
  • Published in 2010
  • Added on 2011-10-14
• Cake Cutting Mechanisms
  • Published in 2012
  • Added on 2012-04-07
• Challenging mathematical problems with elementary solutions
  • Published in 1964
  • Added on 2016-06-08
• Chords of an ellipse, Lucas polynomials, and cubic equations
  • Published in 2018
  • Added on 2019-06-30
• Complexity and Completeness of Finding Another solution and its Application to Puzzles
  • Published in 2003
  • Added on 2016-06-18
• Configuration spaces of hard squares in a rectangle
  • Published in 2020
  • Added on 2020-11-06
• Conway's Wizards
  • Published in 2012
  • Added on 2012-11-03
• Cookie Monster Devours Naccis
  • Published in 2013
  • Added on 2013-10-09
• Fibonacci Jigsaw Puzzle
  • Published in 2016
  • Added on 2016-05-19
• Finding a princess in a palace: A pursuit-evasion problem
  • Published in 2012
  • Added on 2019-10-08
• Folding Polyominoes into (Poly)Cubes
  • Published in 2017
  • Added on 2018-01-03
• Foldings and Meanders
  • Published in 2013
  • Added on 2023-03-22
• Fractal Sequences
  • Published in 1999
  • Added on 2019-08-21
• Frustration solitaire
  • Published in 2007
  • Added on 2017-08-10
• Goldbug Variations
  • Published in 2005
  • Added on 2020-06-12
• How do you fix an Oval Track Puzzle?
  • Published in 2016
  • Added on 2018-03-13
• How to eat 4/9 of a pizza
  • Published in 2011
  • Added on 2012-12-12
• How to Hunt an Invisible Rabbit on a Graph
  • Published in 2015
  • Added on 2019-10-08
• How to Solve "The Hardest Logic Puzzle Ever" and Its Generalization
  • Published in 2022
  • Added on 2022-02-16
• Jewish Problems
  • Published in 2011
  • Added on 2017-03-23
• Magic squares of seventh powers
  • Published in 2004
  • Added on 2015-03-06
• Mastermind is NP-Complete
  • Published in 2005
  • Added on 2012-09-02
• Math Magic
  • Published in 1998
  • Added on 2017-06-21
• Max/Min Puzzles in Geometry
  • Published in 2022
  • Added on 2022-02-16
• Maximum overhang
  • Published in 2007
  • Added on 2021-03-15
• Nice Neighbors: A Brief Adventure in Mathematical Gamification
  • Published in 2016
  • Added on 2018-04-17
• Non-sexist solution of the ménage problem
  • Published in 1985
  • Added on 2013-06-16
• On an error in the star puzzle by Henry E. Dudeney
  • Published in 2012
  • Added on 2012-05-22
• On the Cookie Monster Problem
  • Published in 2013
  • Added on 2016-05-19
• Only problems, not solutions!
  • Published in 1991
  • Added on 2013-07-29
• Pancake Flipping is Hard
  • Published in 2011
  • Added on 2013-11-15
• Parking Functions: Choose Your Own Adventure
  • Published in 2020
  • Added on 2020-09-21
• Picture-Hanging Puzzles
  • Published in 2012
  • Added on 2012-11-03
• PIGTIKAL (puzzles in geometry that I know and love)
  • Published in 2009
  • Added on 2022-10-14
• Planar graph is on fire
  • Published in 2015
  • Added on 2015-12-02
• Port-and-Sweep Solitaire
  • Published in 2010
  • Added on 2019-10-12
• Problems to sharpen the young
  • Published in 1992
  • Added on 2013-03-18
• Rustan Leino's Puzzles
  • Published in 2009
  • Added on 2021-11-23
• Seven Puzzles You Think You Must Not Have Heard Correctly
  • Published in 2006
  • Added on 2016-08-30
• Solving Rush Hour, the Puzzle
  • Published in 2018
  • Added on 2023-03-22
• Solving Triangular Peg Solitaire
  • Published in 2007
  • Added on 2014-11-10
• Soviet Street Mathematics: Landau’s License Plate Game
  • Published in 2018
  • Added on 2018-05-17
• Spot it(R) Solitaire
  • Published in 2013
  • Added on 2017-12-18
• Sub shoot!
  • Published in 2008
  • Added on 2023-01-08
• Sudoku, gerechte designs, resolutions, affine space, spreads, reguli, and Hamming codes
  • Published in 2008
  • Added on 2014-10-02
• The Bulgarian solitaire and the mathematics around it
  • Published in 2015
  • Added on 2017-08-10
• The general counterfeit coin problem
  • Published in 1995
  • Added on 2016-08-24
• The Graph Menagerie: Abstract Algebra and the Mad Veterinarian
  • Published in 2011
  • Added on 2019-11-06
• The grasshopper problem
  • Published in 2017
  • Added on 2018-01-24
• The isoperimetric problem
  • Published in 2001
  • Added on 2011-03-14
• The lost squares of Dr. Franklin: Ben Franklin's missing squares and the secret of the magic circle
  • Published in 2001
  • Added on 2012-10-30
• The mate-in-n problem of infinite chess is decidable
  • Published in 2012
  • Added on 2012-03-28
• The mathematics of Septoku
  • Published in 2008
  • Added on 2013-12-22
• The no-three-in-line problem on a torus
  • Published in 2012
  • Added on 2019-12-10
• The Number-Pad Game
  • Published in 2007
  • Added on 2014-06-11
• The Snowblower Problem
  • Published in 2006
  • Added on 2012-01-22
• The Stick Problem
  • Published in 2013
  • Added on 2014-01-13
• The urinal problem
  • Published in 2010
  • Added on 2013-03-28
• Twin Towers of Hanoi
  • Published in 2011
  • Added on 2012-09-28
• “Lights Out” and Variants
  • Published in 2017
  • Added on 2019-12-09