January 18th, 1991 in roman numerals would be: I/XVIII/MCMXCI
VI.I.MCMXCII
it is I XVIII MCMLXXIX
18 x= 10 v= 5 i= 1 10+5+1+1+1=18
XVIII X = 10 V = 5 I = 1 so, 10 + 5 + 1 + 1 + 1 =18.
The 1 in Roman numerals is represented by the letter "I".
1-22-1992 = I-XXII-MCMXCII
18 in roman numerals looks like XVIII
VI.I.MCMXCII
Nowadays it is: VI-I-MCMXCII
it is I XVIII MCMLXXIX
18 x= 10 v= 5 i= 1 10+5+1+1+1=18
XVIII X = 10 V = 5 I = 1 so, 10 + 5 + 1 + 1 + 1 =18.
The 1 in Roman numerals is represented by the letter "I".
Xviii = 18 x = 10 v = 5 i = 1
21 in Roman numerals is XXI. 1 in Roman numerals is I. 90 in Roman numerals is XC. So, 21 1 90 would be XXI I XC in Roman numerals.
The roman numerals for 1-10 are as follows:IIIIIIIVVVIVIIVIIIIXX
Oh, dude, 1 quintillion in Roman numerals is like a whole bunch of M's. It's a total of 18 M's, which stands for 1,000 each. So, yeah, if you ever need to write out 1 quintillion in Roman numerals, just start practicing your M's!