How would you actually add up the six numbers of 6 17 19 49 99 and 81 using Roman numerals knowing that the answer must be CCLXXI?

Answer 1

Notwithstanding in the way that we would write and work out Roman numerals today the numbers of 6, 17. 19, 49, 99 and 81 when converted into Roman numerals during the Roman era would have probably been notated as VI, XVII, IXX, IL, IC and XXCI respectively which makes addition easily carried out in the following manner:-

VI+XVII = XXIII (23)

XXIII+IXX = XLII (42)

XLII+IL = XCI (91)

XCI+IC = XCC (190)

XCC+XXCI = CCLXXI (271)

Check: 6+17+19+49+99+81 = 271

Additional Information:-

There is evidence to support the fact that the numbers of 1999, 399 and 102 can be converted into Roman numerals as IMM, ICD and CII respectively which when added up in the same method as above totals MMD because:-

IMM+ICD = IICMMD (2398)

IICMMD+CII = MMD (2500)

Check: 1999+399+102 = 2500

Note that the equivalent of 1999, 399 and 2398 in today's notation of Roman numerals are enumerated as MCMXCIX, CCCXCIX and MMCCCXCVIII respectively which makes it quite difficult to perform any kind of mathematical operations with them.