cardinal number         ordinal number

1 one             first         1st

2 two             second        2nd

3 three           third         3rd

4 four            fourth        4th

5 five            fifth         5th

6 six             sixth         6th

7 seven           seventh       7th

8 eight           eighth        8th

9 nine            nineth        9th

10 ten            tenth         10th

11 eleven         eleventh      11th

12 twelve         twelfth       12th

13 thirteen       thirteenth    13th

14 fourteen       fourteenth    14th

15 fifteen        fifteenth     15th

16 sixteen        sixteenth     16th

17 seventeen      seventeenth   17th

18 eighteen       eighteenth    18th

19 nineteen       nineteenth     19th

20 twenty         twentieth      20th

21 twenty- one    twenty-first   21st

22 twenty- two    twenty-second  22nd

23 twenty- three  twenty-third   23rd

24 twenty- four   twenty-fouth   24th

25 twenty - five  twenty-fifth   25th

26 twenty- six    twenty-sixth   26th

27 twenty- senven twenty-seventh 27th

28 twenty-eight   twenty-eighth  28th

29 twenty-nine    twenty-nineth  29th

30 thirty         thirtieth      30th

31 thirty- one    thirty-first   31st