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  2. Roman numerals - Wikipedia

    en.wikipedia.org/wiki/Roman_numerals

    In tarot, Roman numerals (with zero) are often used to denote the cards of the Major Arcana. In Ireland, Roman numerals were used until the late 1980s to indicate the month on postage Franking. In documents, Roman numerals are sometimes still used to indicate the month to avoid confusion over day/month/year or month/day/year formats.

  3. 2000 (number) - Wikipedia

    en.wikipedia.org/wiki/2000_(number)

    1.5 2400 to 2499. 1.6 2500 to 2599. ... Roman numeral: MM, mm: Unicode symbol(s) MM, mm: ... the highest number expressible using only two unmodified characters in ...

  4. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    The number the numeral represents is called its value. Not all number systems can represent the same set of numbers; for example, Roman numerals cannot represent the number zero. Ideally, a numeral system will: Represent a useful set of numbers (e.g. all integers, or rational numbers)

  5. European numerals - Wikipedia

    en.wikipedia.org/wiki/European_numerals

    Roman numerals, the numeral system devised and formerly used by the Romans and still used today to write names such as Elizabeth II or Henry VIII, etc. Topics referred to by the same term This disambiguation page lists articles associated with the title European numerals .

  6. Template:Roman - Wikipedia

    en.wikipedia.org/wiki/Template:Roman

    This template converts Arabic numerals (that is, 1, 2, 3, etc.) into Roman numerals (I, II, III etc.). It currently works for any whole number between 1 and 4999999. It currently works for any whole number between 1 and 4999999.

  7. Latin numerals - Wikipedia

    en.wikipedia.org/wiki/Latin_Numerals

    A special series of numeral adjectives was used for counting these, namely ūnī, bīnī, trīnī, quadrīnī, quīnī, sēnī, and so on. Thus Roman authors would write: ūnae litterae 'one letter', trīnae litterae 'three letters', quīna castra 'five camps', etc.

  8. History of ancient numeral systems - Wikipedia

    en.wikipedia.org/wiki/History_of_ancient_numeral...

    In the Etruscan system, the symbol 1 was a single vertical mark, the symbol 10 was two perpendicularly crossed tally marks, and the symbol 100 was three crossed tally marks (similar in form to a modern asterisk *); while 5 (an inverted V shape) and 50 (an inverted V split by a single vertical mark) were perhaps derived from the lower halves of ...

  9. 240 (number) - Wikipedia

    en.wikipedia.org/wiki/240_(number)

    240 is a pronic number, since it can be expressed as the product of two consecutive integers, 15 and 16. [1] It is a semiperfect number, [2] equal to the concatenation of two of its proper divisors (24 and 40).