**Roman Numerals:**

We all know

Roman numerals is the number system . This numeric system is used in History.This number system is used in a ancient Rome and it written by combinations of letters from the Latin alphabet that signify values.In history time Roman numerals are expressed by letters of the alphabet and but today are rarely used in some special sector except for formality or variety. There are some of four basic Rules for reading Roman numerals.

**Roman Numeral 1 to 50**:

In Roman numeral some numeral are One or more letters placed after another letter of greater value increases the greater value by the amount of the smaller (XV = 15, XVI = 16, XVII = 117, or LXV = 65 ,LXVI = 66 ,LXVII = 67 etc.). In Roman numerals are letter repeated once or twice repeats its value that many times (XXX = 30, CC = 200, etc.).

A letter placed before another letter of greater value decreases the greater value by the amount of the smaller (V = 5, XL = 40, M = 100, etc.)

**Roman Numerals Details** :

The system is based on seven different symbols.This Seven symbols are……

Roman numerical system: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1,000.

**Roman numerals XCI “91”**

The roman numeral XCI corresponds to the Arabic number 91.

How to read and how to write XCI

If number XCI is within to text or sentence it should be read in its equivalent in Arabic numbers, in this case 91.

I | 1 | XI | 11 | XXI | 21 | XXXI | 31 | XLI | 41 |

I | 1 | XII | 12 | XXII | 22 | XXXII | 32 | XLII | 42 |

II | 2 | XIII | 13 | XXIII | 23 | XXXIII | 33 | XLII | 43 |

III | 3 | XIV | 14 | XXIV | 24 | XXXIV | 34 | XLIV | 44 |

IV | 4 | XV | 15 | XXV | 25 | XXXV | 35 | XLIV | 45 |

V | 5 | XVI | 16 | XXVI | 26 | XXXVI | 36 | XLVI | 46 |

VI | 6 | XVII | 17 | XXVII | 27 | XXXVII | 37 | XLVII | 47 |

VII | 7 | XVIII | 18 | XXVIII | 28 | XXXVIII | 38 | XLVIII | 48 |

VIII | 8 | XIX | 19 | XXIX | 29 | XXXIX | 39 | XLIX | 49 |

IX | 9 | XX | 20 | XXX | 30 | XL | 40 | L | 50 |

X | 10 |

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