Answer:
not a valid Roman numeral value. Could be intended as 150.
Explanation:
You want to know the value of the Roman numeral expression XCLX in Arabic numbers.
Roman numerals
The system of Roman numerals makes use of symbols that each have an assigned value. The basic ones are ...
- I – 1
- V – 5
- X – 10
- L – 50
- C – 100
- D – 500
- M – 1000
Some conventions are used to simplify writing certain numbers, and to extend the range beyond a few thousands.
Sequence
In general, the symbols are written in decreasing order of value. The value, in general, is the sum of the values of the symbols used.
One symbol of lower value may be placed in front of a symbol of higher value to indicate the higher value is reduced by that amount. For example, IX means that 1 is subtracted from 10 to give a value of 9. The value subtracted this way is restricted to being the next lower "unit" value, I, X, or C. For example, 950 is written as CML, rather than LM.
Given number
The set of symbols XCLX is not one you would see written by a Roman. It has the value 10 (X) both subtracted from 100 and added to the overall value. It is not recognized as a valid Roman Numeral value.
However, if we follow the rules outlined above, we can say it is equivalent to ...
-10 +100 +50 +10 = 150
XCLX is not a valid Roman Numeral. It could be interpreted as 150.
__
Additional comment
The appropriate way to write 150 is simply CL.
<95141404393>