<P> Since the Middle Ages, a "j" has sometimes been substituted for the final "i" of a "lower - case" Roman numeral, such as "iij" for 3 or "vij" for 7 . This "j" can be considered a swash variant of "i". The use of a final "j" is still used in medical prescriptions to prevent tampering with or misinterpretation of a number after it is written . </P> <P> Numerals in documents and inscriptions from the Middle Ages sometimes include additional symbols, which today are called "medieval Roman numerals". Some simply substitute another letter for the standard one (such as "A" for "V", or "Q" for "D"), while others serve as abbreviations for compound numerals ("O" for "XI", or "F" for "XL"). Although they are still listed today in some dictionaries, they are long out of use . </P> <Table> <Tr> <Th> Number </Th> <Th> Medieval abbreviation </Th> <Th> Notes and etymology </Th> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> Resembles an upside - down V. Also said to equal 500 . </Td> </Tr> <Tr> <Td> 6 </Td> <Td> ↅ </Td> <Td> Either from a ligature of VI, or from digamma (ϛ), the Greek numeral 6 (sometimes conflated with the stigma ligature). </Td> </Tr> <Tr> <Td> 7 </Td> <Td> S, Z </Td> <Td> Presumed abbreviation of septem, Latin for 7 . </Td> </Tr> <Tr> <Td> 11 </Td> <Td> O </Td> <Td> Presumed abbreviation of onze, French for 11 . </Td> </Tr> <Tr> <Td> 40 </Td> <Td> </Td> <Td> Presumed abbreviation of English forty . </Td> </Tr> <Tr> <Td> 70 </Td> <Td> </Td> <Td> Also could stand for 7, with the same derivation . </Td> </Tr> <Tr> <Td> 80 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 90 </Td> <Td> </Td> <Td> Presumed abbreviation of nonaginta, Latin for 90 . (N.B. N is also used for "nothing" (nullus)). </Td> </Tr> <Tr> <Td> 150 </Td> <Td> Y </Td> <Td> Possibly derived from the lowercase y's shape . </Td> </Tr> <Tr> <Td> 151 </Td> <Td> </Td> <Td> Unusual, origin unknown; also said to stand for 250 . </Td> </Tr> <Tr> <Td> 160 </Td> <Td> </Td> <Td> Possibly derived from Greek tetra, as 4 × 40 = 160 . </Td> </Tr> <Tr> <Td> 200 </Td> <Td> </Td> <Td> Could also stand for 2 (see also 𐆙, the symbol for the dupondius). From a barring of two I's . </Td> </Tr> <Tr> <Td> 250 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 300 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 400 </Td> <Td> P, G </Td> <Td> </Td> </Tr> <Tr> <Td> 500 </Td> <Td> Q </Td> <Td> Redundant with D; abbreviates quingenti, Latin for 500 . </Td> </Tr> <Tr> <Td> 2000 </Td> <Td> Z </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Number </Th> <Th> Medieval abbreviation </Th> <Th> Notes and etymology </Th> </Tr>

Write in roman numerals the missing numbers in the table