20. twenty [ˈtwenti]
21. twenty-one [ˈtwenti-wʌn]
22. twenty-two [ˈtwenti-tu:]
23. twenty-three [ˈtwenti-θri:]
24. twenty-four [ˈtwenti-fɔ:]
25. twenty-five [ˈtwenti-faiv]
26. twenty-six [ˈtwenti-siks]
27. twenty-seven [ˈtwenti-ˈsevn]
28. twenty-eight [ˈtwenti-eit]
29. twenty-nine [ˈtwenti-nain]
30. thirty [ˈθə:ti]
