Dozenal divisibility tests
Daily Dozen: Thu 13 May 11EX: Dozenal has easy divisibility tests for all lower integers except 7 and X.
— Dozenal Society DSA (@dozenal) May 15, 2014
Tagged: tweets
103rd day of the year
For the 103rd day of the year: 103 is the reverse of 301. The same is true of their squares: 103² = 10609 and 301² = 90601
— jim wilder (@wilderlab) April 13, 2014
Maths history
Marie-Sophie Germain (1776-1831) made a major contribution to number theory, acoustics and elasticity, born 1 Apr http://t.co/r4Au2iwh8b
— Maths History (@mathshistory) April 1, 2014
Cliff Pickover tweet
Scream! The string 79873884 1st occurs in Pi at position 79873884, counting from 1st digit after the decimal point. pic.twitter.com/kcASDJSV1A
— Cliff Pickover (@pickover) March 30, 2014
Emmy Noether’s birthday
"The most important woman in the history of mathematics" was born 132 years ago today. Share Emmy Noether's story: http://t.co/y9We3hI3UH
— Perimeter Institute (@Perimeter) March 23, 2014
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QI tweet
ZENZIZENZIZENZIC n. The eighth power of a number. ( A word coined by Robert Recorde (c.1512-58), inventor of the = sign)
— The QI Elves (@qikipedia) March 23, 2014
Dozenal Society tweet
Daily Dozen: Sun 1E Mar 11EX: Dozenal e to four places (2;8752) varies 0;0036% from true; decimal (2.7183) varies 0;0046% from true.
— Dozenal Society DSA (@dozenal) March 23, 2014