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Under today's rules governing the Roman numeral system it is: MMCDXCIX. But the Romans themselves would have probably wrote out 2499 simply as IMMD (-1+2500=2499)
No
51*49 = -I*LI + L*LI = -LI+MMDL = IMMD (-1+2500 = 2499) Note that in today's terms 49 and 2499 are written out in Roman numerals as XLIX and MMCDXCIX respectively but the Romans themselves would have probably wrote them out as IL (-1+50 = 49) and IMMD (-1+2500 = 2499) Check: 51*49 = 2499
3097
Depends how long the steps are.