Home Back to the Challenge Answer Try These Think About This... Did You Know?Try Another Challenge  
Resources
Figure This!
Books Books

Doyle, A. C. The Complete Sherlock Holmes. New York, NY: Doubleday, 1953.

Poe, E. A. Tales of Edgar Allan Poe. York, PA: Random House. 1944.

Sinkov, A. Elementary Cryptanalysis. Washington, DC: Mathematical Association of America, 1968.

Games. Ambler, PA: Games Publications, Inc.

 

Letter Frequencies
www.vindustries.com/letterfreq/

Enigma Machine - History
www.nsa.gov/museum/museu00007.cfm
Home · Back to the Challenge · Answer · Try These · Think About This · Did You Know?
Try Another Challenge · Challenge Index · Math Index · Printing the Challenges · En Español
Family Corner · Teacher Corner · About Figure This! · Purchase the CD
©2004 National Council of Teachers of Mathematics
Web site and CD-ROM design/production
© 1999-2004 KnowNet Construction, Inc.