What is Greek numerals?
{{numeral systems}} '''Greek numerals''' are a [[numeral system|system of representing numbers]] using letters of the [[Greek alphabet]]. They are also known by the names ''Milesian numerals'', ''Alexandrian numerals'', or ''alphabetic numerals''. In modern [[Greece]], they are still in use for [[ordinal number]]s, and in much of the same way that [[Roman numerals]] are in the West; for ordinary ([[Cardinal numbers|cardinal]]) numbers, [[Arabic numerals]] are used. At first, before it was used more, the Greek alphabet, [[Linear A]] and [[Linear B]] had used a different system with symbols for 1, 10, 100, 1000 and 10000 operating with the following formula: | = 1, – = 10, ◦ = 100, ¤ = 1000, ☼ = 10000.<ref>{{Cite web |title=Systèmes numéraux en Grèce ancienne: description et mise en perspective historique |url=http://www.dma.ens.fr/culturemath/histoire%20des%20maths/htm/Verdan/Verdan.htm |access-date=2008-07-30 |archive-date=2010-02-02 |archive-url=https://web.archive.org/web/20100202054101/http://www.dma.ens.fr/culturemath/histoire%20des%20maths/htm/Verdan/Verdan.htm |url-status=dead }}</ref> The earliest alphabet-related system of numerals used with the Greek letters was a set of the [[acrophonic]] [[Attic numerals]], operating much like Roman numerals (which derived from this scheme), with the following formula: Ι = 1, Γ = 5, Δ = 10, ΓΔ = 50, Η = 100, ΓΗ = 500, Χ = 1000, ΓΧ = 5000, Μ = 10000 and ΓΜ = 50000. The acrophonic system was replaced by a new alphabetic system, sometimes called the Ionic numeral system, from the [[4th century BC]]. Each unit (1, 2, …, 9) was assigned a separate letter, each tens (10, 20, …, 90) a separate letter, and each hundreds (100, 200, …, 900) a separate letter. This requires 27 letters, so the 24-letter Greek alphabet was extended by using three obsolete letters: [[fau]] ϝ, (also used are [[Stigma (letter)|stigma]]ϛ or, in modern Greek, ΣΤ) for 6, [[Koppa (letter)|koppa]] ϟ for 90, and [[sampi]] ϡ for 900.<ref>{{Cite web |url=http://ptolemy.tlg.uci.edu/~opoudjis/unicode/numera