# Roman numerals

## numbers in the Roman numeral system / From Wikipedia, the free encyclopedia

**Roman numerals** are a numeral system that was used by ancient Rome. Numbers in this system use letters from the Latin alphabet. Currently, it uses seven symbols:^{[1]}

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**Quick Facts**Numeral systems by culture, Hindu–Arabic numerals ...

Numeral systems by culture | |
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Hindu–Arabic numerals | |

Western Arabic Eastern Arabic Khmer |
Indian family Brahmi Thai |

East Asian numerals | |

Chinese Suzhou Counting rods |
Japanese Korean |

Alphabetic numerals | |

Abjad Armenian Cyrillic Ge'ez |
Hebrew Greek (Ionian) Āryabhaṭa |

Other systems | |

Attic Babylonian Egyptian Etruscan |
Mayan Roman Urnfield |

List of numeral system topics | |

Positional systems by base | |

Decimal (10) | |

2, 4, 8, 16, 32, 64 | |

1, 3, 9, 12, 20, 24, 30, 36, 60, more… | |

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The Europeans still used Roman numerals even after the fall of the Roman Empire. From the 14th century, the Europeans replaced Roman numerals with Arabic numerals. However, people still use Roman numerals to this day.

One place in which they are sometimes seen is on clock faces (the front of a clock). For example, on the clock of Big Ben, the hours from 1 to 12 are written as:

**I, II, III, IV, V, VI, VII, VIII, IX, X, XI, XII**

The IV and IX can be read as "one less than 5" (4) and "one less than 10" (9). On many clocks that use Roman numerals, however, 4 is written as IIII.^{[2]}