Category : 5th Class
ROMAN NUMBER
FUNDAMENTALS
Roman symbols and their corresponding Hindu-Arabic numbers
Roman Numerals |
I |
V |
X |
L |
C |
D |
M |
Hindu-Arabic Numerals |
1 |
5 |
10 |
50 |
100 |
500 |
1000 |
Roman numerals formation rules
Example: \[II=1+1=2\]
\[XXX=10+10+10=30\]
\[CC=100+100=200\]
\[MMM=1000+1000+1000=3000\]
It may be noted that no numerals can be repeated more than 3 times. Repetition is allowed only for symbols I, X and C.
V, L and D are never repeated
Example:
\[XII=10+1+1=12\]
\[XV=10+5=15\]
\[LV=50+5=55\]
\[CX=100+10=110\]
Example:
\[IV=51=4\]
\[IX=91=8\]
\[VL=505=45\]
\[VC=1005=95\]
\[XC=10010=90\]
Example: \[XIV=10+(5-1)=14\]
\[XXIV=10+10+(5-1)=24\]
\[CXL=100+(5010)=140\]
If a bar is placed over a symbol in a Roman numeral system, its value is multiplied by 1000.
Example:\[\overline{V}=5000\]
\[\overline{L}=50000\]
\[\overline{C}=100000\]
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