This math riddle relates to Roman Numerals where 19 is IXX, 1 is I, and 20 is XX. By removing I from IXX, you are left with XX.
IXX
Today the equivalent of 19 in Roman numerals are XIX But in ancient Rome they once were XVIIII or IXX In fact the Latin word for XVIIII is 'novemdecim' and the Latin word for IXX is 'undeviginti There is no equivalent Latin word for XIX
........___ VI/X/IXX XC I That line over IXX is crucial. remove/ignore the dots...
In Roman numerals, IXX means 910. X is 10, IX is 9. In Roman times, they used a few letters to make their number system.
This math riddle relates to Roman Numerals where 19 is IXX, 1 is I, and 20 is XX. By removing I from IXX, you are left with XX.
IXX
Today the equivalent of 19 in Roman numerals are XIX But in ancient Rome they once were XVIIII or IXX In fact the Latin word for XVIIII is 'novemdecim' and the Latin word for IXX is 'undeviginti There is no equivalent Latin word for XIX
........___ VI/X/IXX XC I That line over IXX is crucial. remove/ignore the dots...
In Roman numerals, IXX means 910. X is 10, IX is 9. In Roman times, they used a few letters to make their number system.
Due to rules made during the Middle Ages, today we write out 19 in Roman numerals as XIX. But the Romans themselves would have probably wrote out 19 as XVIIII and then simplified it to IXX. In fact the Latin word for 19 is "undeviginti" which literally means one from twenty. Hence: IXX*IXX = -I*IXX + XX*IXX = +I-XX-XX+CCCC = CCCLXI (361) In Hindu-Arabic numerals: -1(-1+20) + 20(-1+20) = +1-20-20+400 = 361
In todays notation of Roman numerals: XIX-VII-MMXII Note that in the Roman era 19 was XVIIII and then abridged to IXX as its Latin name suggest
Because the Latin word for the Roman numerals XVIIII is novemdecim which literally means nineteen (19) and the Latin word for the numerals IXX is undeviginti which literally means one from twenty (20-1). Check it out in a Latin dictionary. The numerals XIX (there's no Latin word for this arrangement of numerals) are supposed to emulate the Hindu Arabic numerals 19 in subtractive notation. But the Roman numerals representing 19 in subtractive notation are IXX (20-1).---That being said, the currently accepted representation of 19 is indeed XIX (10 + 9), not IXX, as it is for 29 (XXIX), 39 (XXXIX), 49 (XLIX), 59 (LIX), 69 (LXIX), 79 (LXXIX), 89 (LXXXIX) and 99 (usually XCIX).
In todays modern notation of Roman numerals it is: XI-XIX But the ancient Romans would have worked out the equivalent of 19 as XVIIII and simplified it to IXX as confirmed in the Latin language
In Roman numerals, 19 is typically written as XIX. To find half of 19 in Roman numerals, you would divide 19 by 2, which equals 9.5. Roman numerals do not have a specific representation for fractions or decimals, so there is no direct equivalent for half of 19 in Roman numerals.
In todays modern notation of Roman numerals it is XIX But there is evidence to suggest that the ancient Romans would have calculated 19 as XVIIII and simplified it to IXX (20-1) in written form.
V-XVIIII-MDCCCCLXXXXIIII or V-IXX-IVMM and notV-XIX-MCMXCIV