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Hindu
XXLII is not a Roman numeral as it does not conforms to the rules of writing numerals. If it were a numeral you might suppose that it would represent... (20 less than 50) + 2 which is of course 32 but the correct Roman numeral for 32 is XXXII
The largest value Roman numeral that you can write, which conforms to the rules of writing Roman numerals, using just D, C and L symbols is DCCCL (850)
No, according to the rules of writing Roman numerals while it is allowable for a single X to preceed L or C two or more numerals should not preceed a numeral of higher value. The correct way to write 89 as a Roman numeral is LXXXIX
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Hindu
XXLII is not a Roman numeral as it does not conforms to the rules of writing numerals. If it were a numeral you might suppose that it would represent... (20 less than 50) + 2 which is of course 32 but the correct Roman numeral for 32 is XXXII
The largest value Roman numeral that you can write, which conforms to the rules of writing Roman numerals, using just D, C and L symbols is DCCCL (850)
No, according to the rules of writing Roman numerals while it is allowable for a single X to preceed L or C two or more numerals should not preceed a numeral of higher value. The correct way to write 89 as a Roman numeral is LXXXIX
Under today's rules now governing the Roman numeral system the given numeral is equivalent to 289
A Roman numeral can be considered invalid due to several reasons. These include using a repetition of the same numeral more than three times in succession (e.g., IIII instead of IV), writing a numeral in a descending order (e.g., XCX instead of C), or using a numeral that is not part of the standard Roman numeral system (e.g., A instead of I).
CXXXXV is not a correctly written Roman numeral. The individual numerals within it are real numerals but according to the rules of writing Roman numerals 'no numeral can be written more than three times in succession.' So, XXXX is not allowed. The numerals you have written add up to 145 and the correct Roman numeral for this is CXLV
CCD is not a Roman numeral. C is a Roman numeral which has a value of 100. D is also a Roman numeral which has a value of 500. However according to the rules of writing Roman numerals although a C can preceed a D, to represent 400, no number should be preceed by two or more numbers of lesser value. If CCD was a Roman numeral it would have a value of 300 but the correct Roman numeral for 300 is CCC.
Under today's rules now governing the Roman numeral system the Roman numeral for 54 is LIV but the ancient Romans would have notated it as LIIII
The Roman numeral for 1000 is M.
Under today's rules now governing the Roman numeral system CXCIX represents 199