A new puzzle every Saturday. Solutions one week later.

May 18,  2013

Puzzle 689 Pandiagonal and twin primes

Date New Who
May-17-13 Puzzle 688 Giovanni Resta, Emmanuel Vantiaghem & Hakan Summakoglu
May-10-13 Puzzle 687 Jeff Heleen, Felipe I. G., J. K. Andersen, Emmanuel Vantieghem, Giovanni Resta, W. E. Clark & Jan van Delden 
May-3-13 Puzzle 686 Emmanuel Vantieghem, Jan van Delden & Hakan Summakoglu

 

 

 

 

These pages will be updated every Saturday morning -- Last Modified on: Friday, 17-May-2013 18:22:07 MDT

"Many thanks to Martha Rivera, Miguel H. Rivera and  G. L. Honaker, Jr. for reviewing and correcting the  very first version of these pages, May 1998 "

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