Because they contained a zero figure for positional place value purposes which made calculations more easier and straightforward.
691 is DCXCI in Roman numerals.
VII - a five, and two ones.
Roman numerals were made just for the same reason as Arabic numerals we are using now.Romans needed some characters to record quantities, dates, taxes etc.So they invented their own system. Bear in mind that roman numerals are older than Arabic ones.
To disguise the year when the production was made
Because the Hindu-Arabic numeral system contains a zero symbol for positional place value purposes making calculations a a lot easier whereas the Roman numeral system does not have a zero symbol in it thus leading to confusion when calculating.
104 is CIV in Roman numerals.
How about arranging 3 ones into Roman numerals as VI = 6
691 is DCXCI in Roman numerals.
VII - a five, and two ones.
Roman numerals were made just for the same reason as Arabic numerals we are using now.Romans needed some characters to record quantities, dates, taxes etc.So they invented their own system. Bear in mind that roman numerals are older than Arabic ones.
Twelve in Roman Numerals is XII, X for ten and the two I's for two ones.
Because the Roman Warriors were the ones to introduce them and they became extinct and caused ripples in the time line.
MCCLXXIII equals MCCLXXIII in Roman numerals. That is, it is already in Roman numerals. However, if you want to know what MCCLXXIII is in Arabic numerals, the ones most of us use today, here is the answer: It translates to 1,273. M=1000, C=100, L=50, X=10, I=1. Two numerals also used but not found in your example are D=500 and V=5.
To disguise the year when the production was made
Because the Hindu-Arabic numeral system contains a zero symbol for positional place value purposes making calculations a a lot easier whereas the Roman numeral system does not have a zero symbol in it thus leading to confusion when calculating.
In Roman numerals, "ivx" is not a valid representation of any number. Roman numerals follow a specific set of rules where smaller numerals placed before larger ones indicate subtraction. "IV" represents the number 4, "V" represents 5, and "X" represents 10. So, if we break down "ivx," it would be read as "IV X," which doesn't conform to the rules of Roman numeral notation.
Arabic numerals are the ones that most people use everyday: 0123456789. Roman Numerals are the ones that use latin letters to represent numbers, like III (3) or XIV (14). You're unlikely to encounter them in everyday life except when they're used as a stylistic choice.