1º first, 1st                                                            30º thirtieth, 30th
2º second, 2nd                                                    40º fortieth, 40th
3º third, 3rd                                                        50º fiftieth, 50th
4º fourth, 4th.                                                    60º sixtieth, 60th
5º fifth, 5th                                                         70º seventieth, 70th
6º sixth, 6th                                                       80º eightieth, 80th
7º seventh, 7th                                                  90º ninetieth, 90th
8º eighth, 8th                                                 100º hundredth, 100th
9º ninth, 9th                                                 1000º thousandth, 1000th
10º tenth, 10th                                      1000000º millionth, 1000000th