Vigesimal: Difference between revisions

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Vigesimal is the name of base 20 number systems.

Twenty (vingt) is used as a base number in French. E.g. quatre-vingt means 4 times 20, i.e. 80.

Twenty (tyve) is used as a base number in the Danish language: Tres (short for tresindstyve) means 3 times 20, i.e. 60; firs (short for firsindstyve) means 4 times 20 i.e. 80. halvtreds means (3 - 1/2) times 20, i.e. 50; halvfjerds means (4 - 1/2) times 20, i.e. 70; and halvfems means (5 - 1/2) times 20, i.e. 90.

Twenty was used as the base of the Mayan number system, see Mayan numerals.

In the old UK currency system, there were twenty shillings in a pound.

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 '''Vigesimal''' is the name of base [[twenty|20]] [[number system]]s.
-Twenty (''vingt'') is used as a base number in [[French language|French]]. E.g.''quatre-vingt'' means 4 times 20, i.e. 80.
+Twenty (''vingt'') is used as a base number in [[French language|French]]. E.g. ''quatre-vingt'' means 4 times 20, i.e. 80.
-Twenty (''tyve'') is used as a base number in the [[Danish language]]: ''Tres'' (short for ''tresindstyve'') means 3 times 20, i.e. 60; ''firs'' (short for ''firsindstyve'') means 4 times 20 i.e. 80. ''Halvtres'' means (3 - 1/2) times 20,
+Twenty (''tyve'') is used as a base number in the [[Danish language]]: ''Tres'' (short for ''tresindstyve'') means 3 times 20, i.e. 60; ''firs'' (short for ''firsindstyve'') means 4 times 20 i.e. 80. ''halvtreds'' means (3 - 1/2) times 20, i.e. 50; ''halvfjerds'' means (4 - 1/2) times 20, i.e. 70;  and ''halvfems'' means (5 - 1/2) times 20, i.e. 90.
-''halvfirs'' means (4 - 1/2) times 20, and ''halvfems'' means (5 - 1/2) times 20.
 Twenty was used as the base of the Mayan number system, see [[Mayan numerals]].