No
It is: XC = 100-10 = 90
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Cross Country Special
Cross Country... XC
C stands for 100 and X stands for 10. In this case the number would be 90.
It is: XC = 100-10 = 90
The Roman numeral XC represents the number 90
Do you mean 12-22-90? If so then it is: XII-XXII-XC
It is: XLL = XC = 90
XC is the usual convention (X =10 subtracted from C = 100). More rarely seen is LXXXX (L=50 and XXXX = 40)