TOPICS

Duodecimal


The base-12 number system composed of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B. Such a system has been advocated by no less than Herbert Spencer, John Quincy Adams, and George Bernard Shaw (Gardner 1984). In fact, duodecimal still has its advocates, some of whom term it "dozenal."

Some aspects of a base-12 system are preserved in the terms dozen and gross applied to the quantities 12 and 144, respectively.

The following table gives the duodecimal equivalents of the first few decimal numbers.

1111B2119
221210221A
331311231B
4414122420
5515132521
6616142622
7717152723
8818162824
9919172925
10A20183026

See also

12, Base, Decimal, Dozen, Gross, Hexadecimal

Explore with Wolfram|Alpha

References

Andrews, F. E. "An Excursion in Numbers." Atlantic Monthly 154, 459-466, Oct. 1934.Andrews, F. E. "My Love Affair with Dozens." Mich. Quart. Rev. 11, 104-110, Spring 1972.Dozenal Society of America. http://www.dozenal.org/.Gardner, M. The Sixth Book of Mathematical Games from Scientific American. Chicago, IL: University of Chicago Press, pp. 104-105, 1984.

Referenced on Wolfram|Alpha

Duodecimal

Cite this as:

Weisstein, Eric W. "Duodecimal." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Duodecimal.html

Subject classifications