CC is 200. XL is 10 from 50 which is 40. CCXL would be 240.
Hindu
CMXLIX (CM=900, XL=40, IX=9)
1000 = M, 200 = CC, 40 = XL and 2 =II, so 1242 would be written as MCCXLII
Xl = -10+50 = 40
It is: 40 = XL
Hindu
CMXLIX (CM=900, XL=40, IX=9)
1000 = M, 200 = CC, 40 = XL and 2 =II, so 1242 would be written as MCCXLII
Xl = -10+50 = 40
It is: 40 = XL
550Improved Answer:-XL = 40
If you mean as in Roman numerals then: C -XL = LX => 100 -40 = 60
40
XL
XL
XL
XL