The Duodecimal Bulletin

Editor: Dr. Patricia Zirkel

Cover Title: A Base Twelve Crossnumber Puzzle

Contents:

• Solution to “Remembering Pi” | Charles Ashbacher &: Monte J. Zerger
• What Would Be a Good Base? | Cedric Smith
• Base 32 Backwards! | Andrew Hodges
• A Proposal | Charles S. Bagley
• Variations on 153_DEK
  • Number One | Brian Dean (Ohio)
  • Number Two | S. Ferguson (DSGB)
  • Number Three | Gene Zirkel (New York)
• History Professor Speaks to DSA Members | Gene Zirkel
  • Prof. Jens Ulff-Müller (Copenhagen) | seminar on history of counting and measuring at NCC | the long hundred
• Available from the Society
• Dozenal Jottings | From Members and Friends
  • John D. Hansen, Jr
  • Jay L. Schiffman | Congruences and Divisibility Tests | 49th Annual Meeting of Metropolitan New York Section of Mathematical Association of America
  • Peter D. Thomas | announcement of modular arithemtic work in American Metric Journal
  • Paul Schumacher | The Presidential Election of 1856 | in Topical Time
  • Dr. Patricia Zirkel | two paters on medieval topics
  • Henry C. Churchman | gift to DSA forwarded by John P. Churchman
  • kay McKiernan | gift in memory of husband Dr. Ellis R. Von Eschen
  • Bruce Moon
  • New Members: Joan Alice Young, Nader Rafaty Malaky, Robert S. Harris, Monte James Zerger, John Barton, Dale S. Milne, George Peter Jelliss
• Solution to “A Cryptarithm” | A Puzzle
• Why Change, Indeed? | Gene Zirkel | quoting American Metric Journal, Vol. 19, p. 3, unit 3, May/June 1991
• A Base twelve Crossnumber Puzzle | Charles Ashbacher
• Quote on 12 representing "completeness" in numerology | from Smithsonian, Feb 1987
• Duodecimal Prime Palindromes | Charles W. Trigg
• Counting in Dozens