What is the roman numeral of 10000?

Answer 1

An X with a line over the top of it represents 10,000.

V = 5000

X = 10000

L = 50000

Note that all three numerals above should be represented with lines above them to denote their difference from 5, 10, and 50 respectively.

However, Nowadays the use of the Horizontal Line running parallel verticlated of the symbol has been slowly phased out so 10000 would literally be MMMMMMMMMM and yes... 100000 would mean a lot of M's!! 9000 would not apply to any rule and would be MMMMMMMMM but as you can use the line if you still want to then 9000 would obviously be CMX with a line verticlated with the X

Answer 2

The Roman numeral for 10,000 is "X". However, in ancient Rome, using a single symbol to represent such a large number was not common, and people would often write it as a series of "M" symbols, meaning 10,000.