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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. Roman numeral analysis - Wikipedia

    en.wikipedia.org/wiki/Roman_numeral_analysis

    The system is similar to that of Figured bass, the Arabic numerals describing the characteristic interval(s) above the bass note of the chord, the figures 3 and 5 usually being omitted. The first inversion is denoted by the numeral 6 (e.g. I 6 for the first inversion of the tonic triad, even though a complete figuring would require I 6 3); the ...

  4. 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.

  5. 666 (number) - Wikipedia

    en.wikipedia.org/wiki/666_(number)

    The number of integers which are relatively prime to 666 is also 216, () =; [6] and for an angle measured in degrees, ⁡ = ⁡ = (where here is the golden ratio). [ 7 ] [ 8 ] [ a ] 666 is also the sum of the squares of the first seven primes (2 2 + 3 2 + 5 2 + 7 2 + 11 2 + 13 2 + 17 2 ) , [ 7 ] [ 10 ] while the number of twin primes less than ...

  6. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    Hellenistic and Roman astronomers used a base-60 system based on the Babylonian model (see Greek numerals § Zero). Before positional notation became standard, simple additive systems (sign-value notation) such as Roman numerals were used, and accountants in ancient Rome and during the Middle Ages used the abacus or stone counters to do ...

  7. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    The use of these digits is less common in Thailand than it once was, but they are still used alongside Arabic numerals. [4] The rod numerals, the written forms of counting rods once used by Chinese and Japanese mathematicians, are a decimal positional system used for performing decimal calculations. Rods were placed on a counting board and slid ...

  8. 6 - Wikipedia

    en.wikipedia.org/wiki/6

    6 is the 2nd superior highly composite number, [5] the 2nd colossally abundant number, [6] the 3rd triangular number, [7] the 4th highly composite number, [8] a pronic number, [9] a congruent number, [10] a harmonic divisor number, [11] and a semiprime. [12] 6 is also the first Granville number, or -perfect number.

  9. Stock nomenclature - Wikipedia

    en.wikipedia.org/wiki/Stock_nomenclature

    In the "Stock system", the oxidation states of some or all of the elements in a compound are indicated in parentheses by Roman numerals. [1] [2] Style