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A medieval accounting text from 1301 renders numbers like 13,573 as "XIII. M. V. C. III. XX. XIII", that is, "13×1000 + 5×100 + 3×20 + 13". [ 39 ] Other numerals that do not fit the usual patterns – such as VXL for 45, instead of the usual XLV — may be due to scribal errors, or the writer's lack of familiarity with the system, rather ...
A school identification number in Bali, written with Balinese numerals above and Arabic numerals below. The numerals 1–10 have basic, combining, and independent forms, many of which are formed through reduplication.
The Latin numerals are the words used to denote numbers within the Latin language. They are essentially based on their Proto-Indo-European ancestors, and the Latin cardinal numbers are largely sustained in the Romance languages.
210 is an abundant number, [1] and Harshad number. It is the product of the first four prime numbers (2, 3, 5, and 7), and thus a primorial, [2] where it is the least common multiple of these four prime numbers. 210 is the first primorial number greater than 2 which is not adjacent to 2 primes (211 is prime, but 209 is not).
Leonhard Euler noted 65 idoneal numbers (the most known, of only a maximum possible of two more), such that + for an integer , expressible in only one way, yields a prime power or twice a prime power.
The Aëtius parapegma is an almanac that appears as a chapter in the 6th-century Tetrabiblos of Aëtius of Amida.It treats the rising and setting of constellations, weather forecasting, and medical advice as closely intertwined, and notes of the equinox (placed on September 25) that
The original Roman calendar is usually believed to have been an observational lunar calendar [2] whose months ended and began from the new moon. [3] [4] Because a lunar cycle is about 29.5 days long, such months would have varied between 29 and 30 days. [5]