No eleven is not IX, it would be XI. The lower symbol in front of a larger one means to subtract, in this case it is nine (9).
The Roman numeral IX is 9.
IX-XI-MCMLXXIX
It is: IX = 9
The roman numeral for 9699 is (IX)DCXCIX
The Roman numeral IX is 9.
The roman numeral for number 9 is: IX
IX IX
IX
[IX]
IX
IX
Roman Numeral Series IX - 1981 was released on: USA: 1981