The numbers 1,2,3,4,5,6,7,8,9, 10 etc, which we have been using so far, are the numbers from the HinduArabic numeral system . This is not the only system available. One of the early systems of writing numerals is the system of Roman numerals e.g. I, II, III, IV, V, VI, VII, VIII, IX, X etc. This system is still used in many places.
For example, we can see the use of Roman numerals in clocks; it is also used for classes in the school time table etc.
I, II, III, IV, V, VI, VII, VIII, IX, X denote 1,2,3,4,5,6,7,8,9 and 10 respectively. This is followed by XI for 11, XII for 12,... till XX for 20. Some more Roman numerals are :
(b) A symbol is not repeated more than three times. But the symbols V, L and D are never repeated.
(c) If a symbol of smaller value is written to the right of a symbol of greater value, its value gets added to the value of greater symbol.
VI = 5 + 1 = 6, XII = 10 + 2 = 12
and LXV = 50 + 10 + 5 = 65
(d) If a symbol of smaller value is written to the left of a symbol of greater value, its value is subtracted from the value of the greater symbol.
IV = 5 – 1 = 4, IX = 10 – 1 = 9
XL= 50 – 10 = 40, XC = 100 – 10 = 90
(e) The symbols V, L and D are never written to the left of a symbol of greater value, i.e. V, L and D are never subtracted.
The symbol I can be subtracted from V and X only.
The symbol X can be subtracted from L, M and C only.
Question : Write the Roman number for the following HinduArabic numbers : 289, 490, 758, 890, 995, 1115, 1419, 1899, 2534, 909, 1001
Answer :
For example, we can see the use of Roman numerals in clocks; it is also used for classes in the school time table etc.
I, II, III, IV, V, VI, VII, VIII, IX, X denote 1,2,3,4,5,6,7,8,9 and 10 respectively. This is followed by XI for 11, XII for 12,... till XX for 20. Some more Roman numerals are :
I  V  X  L  C  D  M 
1  5  10  50  100  500  1000 
HinduArabic numeral system and corresponding system of Roman numerals
HinduArabic numeral system  =  Roman numerals system  HinduArabic numeral system  =  Roman numerals system 
1  =  I  10  =  X 
2  =  II  20  =  XX 
3  =  III  30  =  XXX 
4  =  IV  40  =  XL 
5  =  V  50  =  L 
6  =  IV  60  =  LX 
7  =  VII  70  =  LXX 
8  =  VIII  80  =  LXXX 
9  =  IX  90  =  XC 
100  =  C  
500  =  D  
1000  =  M 
The rules for writing numbers in the Roman system are :
(a) If a symbol is repeated, its value is added as many times as it occurs: i.e. II is equal 2, XX is 20 and XXX is 30.(b) A symbol is not repeated more than three times. But the symbols V, L and D are never repeated.
(c) If a symbol of smaller value is written to the right of a symbol of greater value, its value gets added to the value of greater symbol.
VI = 5 + 1 = 6, XII = 10 + 2 = 12
and LXV = 50 + 10 + 5 = 65
(d) If a symbol of smaller value is written to the left of a symbol of greater value, its value is subtracted from the value of the greater symbol.
IV = 5 – 1 = 4, IX = 10 – 1 = 9
XL= 50 – 10 = 40, XC = 100 – 10 = 90
(e) The symbols V, L and D are never written to the left of a symbol of greater value, i.e. V, L and D are never subtracted.
The symbol I can be subtracted from V and X only.
The symbol X can be subtracted from L, M and C only.
Convert HinduArabic Numbers from 1 to 100 into Roman Numbers


Answer :
HinduArabic numeral system  =  Roman numerals system 
289  =  CCLXXXIX 
490  =  CDXC 
758  =  DCCLVIII 
890  =  DCCCXC 
995  =  CMXCV 
1115  =  MCXV 
1419  =  MCDXIX 
1899  =  MDCCCXCIX 
2534  =  MMDXXXIV 
909  =  CMIX 
1001  =  MI 
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