Dozenal Society of America

Dedicated to research and education on the use of base twelve arithmetic in mathematics, engineering, metrology, and other branches of pure and applied science.

[Dozenal Society of America @dozenal]

Chord Dialer: A neat little device which uses dozens to identify chords. https://t.co/LoagpzLLcp

[Dozenal Society of America @dozenal]

Newly published! Trigons to Triads: A Play on Chords. https://t.co/s9eD9cLGSK

[Dozenal Society of America @dozenal]

@AKADouglasFresh Indeed! Just haven't been tweeting much. Hope to remedy that in the near future...

[Dozenal Society of America @dozenal]

Daily Dozen: Fri 05 Jan 1202: Dozen is lowest *abundant number*; it has so many divisors that they add up to more than the dozen itself.

[Dozenal Society of America @dozenal]

Daily Dozen: Thu 04 Jan 1202: Half of one-place fractions *more* accurate in dozenal; a sixth *equally* accurate; only a third *less*.

[Dozenal Society of America @dozenal]

Daily Dozen: Wed 03 Jan 1202: Dozenal calculations are "more than one-and-a-half times as fast" as decimal. ---A.C. Aitken

[Dozenal Society of America @dozenal]

Daily Dozen: Tue 02 Jan 1202: Dozenal divisibility test for 6: any number ending in 0 or 6.

[Dozenal Society of America @dozenal]

Daily Dozen: Mon 01 Jan 1202: Dozenal pi to four places (3;1848) varies 0;0009% from true; decimal (3.1416) varies 0;001X% from true.

[Dozenal Society of America @dozenal]

Daily Dozen: Sun 27 Dec 1201: The duodecimal...is the scale of civilization. ---Levi Conant

[Dozenal Society of America @dozenal]

Daily Dozen: Sat 26 Dec 1201: Dozenal divisibility test for 3: any number ending in 0, 3, 6, or 9.

[Dozenal Society of America @dozenal]

Daily Dozen: Fri 25 Dec 1201: The twelfth term of the Fibonacci series is twelve squared; the only perfect square in the series above 1.

[Dozenal Society of America @dozenal]

Daily Dozen: Thu 24 Dec 1201: Trouble reading music? Dozenal gives the answer! https://t.co/EHHzxmkWkt

[Dozenal Society of America @dozenal]

Daily Dozen: Wed 23 Dec 1201: The duodecimal...is the scale of civilization. ---Levi Conant

[Dozenal Society of America @dozenal]

Daily Dozen: Tue 22 Dec 1201: Dozenal pi to four places (3;1848) varies 0;0009% from true; decimal (3.1416) varies 0;001X% from true.

[Dozenal Society of America @dozenal]

Daily Dozen: Mon 21 Dec 1201: Twelve is the lowest composite square-prime; its factorization is a perfect square (2^2) times a prime (3).

[Dozenal Society of America @dozenal]

Daily Dozen: Sun 20 Dec 1201: Product of first two parts of Pythagorean triplets is multiple of twelve; of three, multiple of five dozen.

[Dozenal Society of America @dozenal]

Daily Dozen: Sat 1E Dec 1201: Forget metric; discover Pendlebury's dozenal TGM! https://t.co/oPLnajEEf1

[Dozenal Society of America @dozenal]

Daily Dozen: Fri 1X Dec 1201: Half of one-place fractions *more* accurate in dozenal; a sixth *equally* accurate; only a third *less*.

[Dozenal Society of America @dozenal]

Daily Dozen: Thu 19 Dec 1201: Dozen has four even divisors: 2, 3, 4, 6. Twice as many as decimal (2, 5).

[Dozenal Society of America @dozenal]

Daily Dozen: Wed 18 Dec 1201: The sum of all natural numbers is the negative reciprocal of twelve. https://t.co/WUxhpiFsr8⋯