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Preparation : Just what you need to know ! The Romans used seven symbols and their different combinations to write numbers.
| Roman Numeral | I | V | X | L | C | D | M | | Value | 1 | 5 | 10 | 50 | 100 | 500 | 1000 |
The following three rules must be noted.
- Symbols V, L, D can be used only once at a time. Symbols I, X, C, M can be repeated thrice at a time.
Examples: III stands for 1 + 1 + 1 = 3. XXX stands for 10 + 10 + 10 = 30.
- Only symbols I, X, C are used for addition and subtraction.
Add when the smaller symbol is to the right of the bigger one.
Subtract when the smaller symbol is to the left of the bigger one.
Examples: XI stands for 10 + 1 = 11. IX stands for 10 - 1 = 9.
- Symbol I can be added to or subtracted from V, X only.
Symbol X can be added to or subtracted from L, C only.
Symbol C can be added to or subtracted from D, M only.
Examples: VI stands for 5 + 1 = 6. IV stands for 5 - 1 = 4.
The quiz below uses I, V, X. |
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