The first, the second, the third ...

1^st first

11^th eleventh

21^st twenty-first

2^nd second

12^th twelfth

22^nd twenty-second

3^rd third

13^th thirteenth

23^rd twenty-third

4^th fourth

14^th fourteenth

24^th twenty-fourth

5^th fifth

15^th fifteenth

25^th twenty-fifth

6^th sixth

16^th sixteenth

26^th twenty-sixth

7^th seventh

17^th seventeenth

27^th twenty-seventh

8^theighth

18^th eighteenth

28^th twenty-eighth

9^th ninth

19^th nineteenth

29^th twenty-ninth

10^th tenth

20^th twentieth

30^th thirtieth

100^th hundredth

1000^ththousandth

 etc