**What is Roman Numerals?**

Math section in a competitive exam is the most important part of the exam. It doesn’t mean that other topics are not so important. But only math portion can leads you to a good score. A good score comes with practice and practice. The only thing you need to do is to do your math problems correctly and within time, and this can be achieved only by using shortcut tricks. But it doesn’t mean that you can’t do math problems without using any shortcut tricks. You may have that potential that you may do maths within time without using any shortcut tricks. But other peoples may not do the same. For those we prepared this roman numeral topic. We try our level best to put together all types of roman numeral here. But it possible we miss any. We appreciate if you share that with us. Your little help will help others.

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**:

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.

Symbol | Value |

I | 1 |

V | 5 |

X | 10 |

L | 50 |

C | 100 |

D | 500 |

M | 1000 |

Numbers are formed by combining symbols together and adding the values.

Means we assign a number by combining of Roman symbol together.

**The system of Addition Roman Numerals:**

In this system a letter placed after another of greater value adds (thus XVII or xvii is 17),

**The system of Subtraction Roman Numerals:**

whereas a letter placed before another of greater value subtracts (thus XC is 90).

**Zero (0):**

The number zero does not have its own Roman numeral, but the word null (the Latin word meaning “none”) was used by medieval composts in lieu of 0.

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how the interconversion of celsius and fahrenhiet scale is given by f=(9/5)c +32 ?