Roman numerals

The table below equivalent of roman numerals to Arabic numeral

1	2	3	4	5	6	7	8	9
I	II	III	IV	V	VI	VII	VII	IX
10	20	30	40	50	60	70	80	90
X	XX	XXX	XL	L	LX	LXX	LXX	XC
100	200	300	400	500	600	700	800	900
C	CC	CCC	CD	D	DC	DCC	DCC	CM
1000	2000	3000
M	MM	MMM

 

Examples

1.   39 = XXX + IX = XXXIX.
2.  246 = CC + XL + VI = CCXLVI.
3.  789 = DCC + LXXX + IX = DCCLXXXIX.
4. 2,421 = MM + CD + XX + I = MMCDXXI.
5. 160 = C + LX = CLX
6. 207 = CC + VII = CCVII
7. 1,009 = M + IX = MIX
8. 1,066 = M + LX + VI = MLXVI

Examples writing years in Roman numbers

• 1776 = M + DCC + LXX + VI = MDCCLXXVI
• 1918 = M + CM + X + VIII = MCMXVIII
• 1954 = M + CM + L + IV = MCMLIV
• 2014 = MM + X + IV = MMXIV
• 3,999 = MMM + CM + XC + IX = MMMCMXCIX

Common question require a student to change Arabic to Roman numeral and vice versa.

Examples

1. Write XXIV in Hindu Arabic numerals.

Solution

XXIV = 20 + 4 = 24

2. Write 79 in Roman numerals

79 = 70 + 9

LXX + IX

LXXIX

Exercise

1. Write the following Roman number into Hundu Arabic numeral
   • XLI
   • LVI
   • LXXXII
   • CLXXIV
   • MI
2. Write the following figures in Roman numeral
   • 99
   • 121
   • 26
   • 14
   • 294

 

 

Solution

1. Write the following Roman number into Hundu Arabic numeral
   • XLI = 40 + 1 = 41
   • LVI = 50 + 6 = 56
   • LXXXII = 70 + 2 = 72
   • CLXXIV= 100 + 20 + 4 = 124
   • MI = 1000 + 1 = 1001
2. Write the following figures in Roman numeral
   • 99 = XC + IX = XCIX
   • 121= C + XX + I = CXXI
   • 26 = X + VI = XVI
   • 14 = X + IV = XIV
   • 294 = CC + XC + IV = CCXCIV

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Compiled by Dr. Bbosa Science +256 778 633 682

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