They are simply the numbers which we use today i.e. 1 2 3 4 5 ..... etc
These Roman numerals represent 236 in Hindu-Arabic numerals
Exactly as in the question 999 which are in Hindu-Arabic numerals.
It is already in Hindu-Arabic numerals but if you mean in Roman numerals then it is written as: CXXIII
Hindu Arabic numerals are basically digits. How do you write 56005040 in Hindu Arabic numerals? It is written like this: 56005040. I think you mean Roman numerals or something.
The Roman numerals of CCXXXVII are the equivalent of 237 in Hindu-Arabic numerals
Hindu Arabic numerals are the ones we use. 39 is already in Hindu-Arabic numerals.
They are Roman numerals and they mean 1161 when converted into Hindu-Arabic numerals
680
The Roman numerals LXVII=67 in Hindu Arabic numerals.
It means 3280 in Hindu-Arabic numerals
They represent the Hindu-Arabic numerals of 174
The Roman numerals VV VVV can be simplified to X XV and converted into Hindu-Arabic numerals are 10 and 15 respectively.