18,607 18,606 18,608
name the numeral comes before the given cardinals number 2599 2598
9998
18606, 18608
The idea is to subtract 1 from that number.
There is no such number because the given numerals are an invalid arrangement of Roman numerals
Surname comes after their given name.
That depends on what Roman numerals of which none has been given.
The given Roman numerals are equivalent to 1112
You have already given it in Roman numerals
The given numerals are an invalid arrangement of Roman numerals and so therefore there is no equivalent of them in Hindu-Arabic numerals.
2598
1055