Thirty
Thirty | |
---|---|
30th | |
presentation | |
Roman | XXX |
dual | 1 1110 |
Octal | 36 |
Duodecimal | 26th |
Hexadecimal | 1E |
Morse code | · · · - - - - - - - |
Mathematical properties | |
sign | positive |
parity | straight |
Factorization | |
Divider | 1, 2, 3, 5, 6, 10, 15, 30 |
The thirty (30) is the natural number between twenty-nine and thirty-one . It is even and the smallest Sphenic number .
Linguistic
The word thirty was formed from ahd. Drīzuc , since the Germanic t changed to an s sound after a vowel , the z disappeared in favor of the ß .
The Latin triginta and the Greek τριάκοντα (triakonta) occasionally appear in foreign or technical terms such as Trigintillion or Triakontan .
History and society
- The rule of the thirty was a reign of terror of 30 oligarchs in Athens (404/403 BC)
- The Triginta tyranni (Thirty Tyrants) were a group of soldier emperors who are presented in brief biographies in the Historia Augusta .
- A devastating historical event in early modern Europe was the Thirty Years War .
- Thirties was the name given to the political refugees from the struggle for freedom in Germany in the 1830s.
- The thirtieth is a term from the federal German inheritance law: for 30 days after the inheritance, an heir must continue to provide maintenance to certain family members of the deceased.
- The thirtieth year is a cycle of stories by Ingeborg Bachmann (1961).
- " Trizesisms " were a Württemberg tax of thirties
See also
- The year 30
Web links
Commons : Thirty - collection of images, videos, and audio files
Wiktionary: thirty - explanations of meanings, word origins, synonyms, translations
Wikiquote: Thirty Quotes