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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. 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 ...

  4. Roman numeral analysis - Wikipedia

    en.wikipedia.org/wiki/Roman_numeral_analysis

    Roman numeral analysis of the standard twelve-bar blues In music theory, fake books and lead sheets aimed towards jazz and popular music , many tunes and songs are written in a key, and as such for all chords, a letter name and symbols are given for all triads (e.g., C, G 7 , Dm, etc.).

  5. Square One Television - Wikipedia

    en.wikipedia.org/wiki/Square_One_Television

    Sketches were presented in various formats, including music videos featuring a particular subject in mathematics and taught the subject through song (e.g., Roman numerals, obtuse and acute angles, percentages, negative numbers, etc.) or comedic sketches (e.g., General Mathpital, a parody of General Hospital; Nobody's Inn, a parody of Fawlty ...

  6. 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)

  7. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    A binary clock might use LEDs to express binary values. In this clock, each column of LEDs shows a binary-coded decimal numeral of the traditional sexagesimal time.. The common names are derived somewhat arbitrarily from a mix of Latin and Greek, in some cases including roots from both languages within a single name. [27]

  8. 41 (number) - Wikipedia

    en.wikipedia.org/wiki/41_(number)

    41 is: . the 13th smallest prime number.The next is 43, making both twin primes.; the sum of the first six prime numbers (2 + 3 + 5 + 7 + 11 + 13). the 12th supersingular prime [1]

  9. 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 .