### Theory:

Roman numeral is a number system that originated in ancient roman. Ancient Romans used some special notation to show numbers. In this system, the numbers are represented by the Latin alphabets.

**asic Roman symbols:**

1 | 5 | 10 | 50 | 100 | 500 | 1000 |

I | V | X | L | C | D | M |

**Combination of Roman numerals:**1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |

I | II | III | IV | V | VI | VII | VIII | IX |

10 | 20 | 30 | 40 | 50 | 60 | 70 | 80 | 90 |

X | XX | XXX | XL | L | LX | LXX | LXXX | XC |

100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |

C | CC | CCC | CD | D | DC | DCC | DCCC | CM |

Rules for forming numbers:

- If a symbol is repeated, its value is added as many times as it occurs. For example, \(XXX = 10+10+10 =30, DCC =500 +100+100 = 700\)
- Any symbol appears after the large symbol, add it. For example, \(VII = V+II = 5 + 2 = 7\).
- Any symbol appears before the large symbol, subtract it. For example, \(XIX = X+IX = 10+(10-1) = 10+9 = 19\)

Important!

Same symbols cannot be used more than three times continuously.

**Write in Roman numeral form:**

Example:

$\begin{array}{l}96\phantom{\rule{0.147em}{0ex}}=90+6\\ =(100-10)+(5+1)\\ =\mathit{XC}\phantom{\rule{0.147em}{0ex}}+\phantom{\rule{0.147em}{0ex}}\mathit{VI}\\ =\mathit{XCVI}\\ \\ 2467\phantom{\rule{0.147em}{0ex}}=2000++400+60+7\\ =(1000+1000)+(500-100)+(50+10)+(5+2)\\ =M+M+\mathit{CD}+\mathit{LX}+\mathit{VII}\\ =\mathit{MMCDLXVII}\end{array}$