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Number

A number that describes a quantity only consists of digits. Other numbers may however also contain letters and symbols.

 

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Explanation

They are often used to indicate a position within a hierarchy, as for house numbering. But sometimes there is not even an hierarchy as with telephone numbers.

 

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Examples

A house number can be written as

12^A

A telephone number can consist of

+ 49 (0) 221 – 345952 / 1

A flight number can be

B 3752 HL

 

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