De ronde getallen
10th= ten > tenth
20th= twenty > twentieth
30th= thirty > thirtieth
40th= forty > fortieth
50th= fifty > fiftieth
60th= sixty > sixtieth
70th= seventy > seventieth
80th= eighty > eightieth
90th= ninety > ninetieth
21st= twenty-one > twenty-first
22nd= twenty-two > twenty-second
23rd= twenty-three > twenty-third
24th= twenty-four > twenty-fourth
25th= twenty-five > twenty-fifth
26th= twenty-six > twenty-sixth
27th= twenty-seven > twenty-seventh
28th= twenty-eight > twenty-eighth
29th= twenty-nine > twenty-ninth
31st= thirty-one > thirty-first
42nd= forty-two > forty-second
53rd= fifty-three > fifty-third
64th= sixty-three > sixty-fourth