Ponder This Challenge - May 2004 - A twist on "Towers of Hanoi" puzzlePuzzleDon Coppersmith01 May 2004Ponder This
Ponder This Challenge - April 2004 - Labeling VCR cassettes using digit stickersPuzzleDon Coppersmith01 Apr 2004Ponder This
Ponder This Challenge - March 2004 - Number of weakly monotone arraysPuzzleDon Coppersmith01 Mar 2004Ponder This
Ponder This Challenge - February 2004 - Right isosceles triangle with integer sidesPuzzleDon Coppersmith01 Feb 2004Ponder This
Ponder This Challenge - January 2004 - Finding duplicates in read-only arrayPuzzleDon Coppersmith01 Jan 2004Ponder This
Ponder This Challenge - December 2003 - Similar dissection of quadrilateralsPuzzleDon Coppersmith01 Dec 2003Ponder This
Ponder This Challenge - November 2003 - Line intersecting curve in a pentagonPuzzleDon Coppersmith01 Nov 2003Ponder This
Ponder This Challenge - October 2003 - Non attacking new chess pieces IIPuzzleDon Coppersmith01 Oct 2003Ponder This
Ponder This Challenge - September 2003 - Irrational root of polynomialPuzzleDon Coppersmith01 Sep 2003Ponder This
Ponder This Challenge - August 2003 - Non attacking chess piecesPuzzleDon Coppersmith01 Aug 2003Ponder This
Ponder This Challenge - July 2003 - Coloring roads to enable blind directionPuzzleDon Coppersmith01 Jul 2003Ponder This
Ponder This Challenge - June 2003 - Partitioning a square into rectanglesPuzzleDon Coppersmith01 Jun 2003Ponder This
Ponder This Challenge - May 2003 - sqrt(1+2*sqrt(1+3*sqrt(...+n*sqrt(1]PuzzleDon Coppersmith01 May 2003Ponder This
Ponder This Challenge - April 2003 - Bounds on a Hamiltonian tourPuzzleDon Coppersmith01 Apr 2003Ponder This
Ponder This Challenge - February 2003 - Zero sum in Boolean cardsPuzzleDon Coppersmith01 Feb 2003Ponder This