1. 2. 3. 4. 5. 6. 7. 8. 9. 10. | first second third fourth fifth sixth seventh eigth ninth tenth | 1 st, 1 st 2 nd, 2 nd 3 rd, 3 rd 4 th, 4 th 5 th, 5 th 6 th, 6 th 7 th, 7 th 8 th, 8 th 9 th, 9 th 10 th, 10 th |
11. 12. 13. 14. 15. 20. 21. 25. 30. | eleventh twelfth thirteenth fourteenth fifteenth twentieth twenty-first twenty-fifth thirtieth | 11 th, 11 th 12 th, 12 th 13 th, 13 th 14 th, 14 th 15 th, 15 th 20 th , 20 th 21 th, 21 th 25 th, 25 th 30 th, 30 th |