Class 6 Maths Knowing Our Numbers  Roman Numerals 
Roman Numerals
The number system invented by Romans is called Roman number system or Roman Numerals.
Symbol 
Value 
Repitition Allowed 
I 
1 
Yes (3 times at max) 
V 
5 
No 
X 
10 
Yes (3 times at max) 
L 
50 
No 
C 
100 
Yes (3 times at max) 
D 
500 
No 
M 
1000 
Yes (3 times at max) 
Rules for writing Roman Numerals:
Problem: Write in Roman Numerals. Solution: 

(a) 73 73 = 70 + 3 70 = 50 + 10 + 10 = LXX 3 = 1 + 1 + 1 = III Hence 73 can be written as LXXIII 
(b) 92 92 = 90 + 2 90 = 100  10 = XC 2 = 1 + 1 = II Hence 92 can be written as XCII 
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