XII, XVII and XC respectively
It is: XLL = XC = 90
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.
90 = XC
xviiivlxxix = 90
XC = 90
It is: XLL = XC = 90
XIII/XII/XC
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.
Do you mean 12-22-90? If so then it is: XII-XXII-XC
90 = XC
90 in Roman numerals is XC.
XC or LXXXX
XC = 90
xviiivlxxix = 90
90 is written as XC
C stands for 100 and X stands for 10. In this case the number would be 90.
The above numbers converted into Roman numerals are M, CM, XC, XII and IX respectively whereas notwithstanding today's enumeration of Roman numerals the Romans themselves would have probably calculated them in the following manner:- M+CM = CMM (1000+900 = 1900) CMM+XC = XMM (1900+90 = 1990) XMM+XII = MMII (1990+12 = 2002) MII+IX = MMXI (2002+9 = 2011) Alternatively the Romans could have calculated these numerals on an abacus counting device giving the same result as follows:- M+DCCCC = MDCCCC (1000+900 = 1900) MDCCCC+LXXXX = MDCCCCLXXXX (1900+90 = 1990) MDCCCCLXXXX+XII = MMII (1990+12 = 2002) MMII+VIIII = MMXI (2002+9 = 2011)