What number does M stand for in Roman numerals?
Answer1,000
In Roman numerals M is 1,000; D is 500, C is 100 and L is 50.
Language · Facts & stats
M facts & stats
7 fact-checked facts about the letter M, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Lowercase m is the SI symbol for which unit?
AnswerMetre
m is the metre; the minute is min and the mole is mol.
Going deeper
How is the letter M written in Morse code?
AnswerTwo dashes
M is dash dash; dot dash is A and dash dot is N.
The letter M comes from a Phoenician letter, mem, believed to represent what?
AnswerWater
Phoenician mem is thought to picture waves of water; aleph was an ox and beth a house.
Which Greek letter corresponds to M?
AnswerMu
The Greek letter mu (Μ, μ) comes from the same Phoenician source as Latin M.
Expert level
In Messier's catalog of deep-sky objects, the Andromeda Galaxy is known as what?
AnswerM31
Andromeda is M31; M1 is the Crab Nebula, M42 the Orion Nebula and M45 the Pleiades.
As an SI prefix, what does the Greek letter μ (mu) mean?
AnswerMicro, one millionth
The prefix micro (μ) means 10⁻⁶, as in micrometre.
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