ਇੱਕੀ (ikkī) - twenty-one

ਬਾਈ (bāī) - twenty-two

ਤੇਈ (teī) - twenty-three

ਚੌਵੀ (cauvī) - twenty-four

ਪੰਝੀ (paṃjhī) - twenty-five

ਛੱਬੀ (chabbī) - twenty-six

ਸਤਾਈ (satāī) - twenty-seven

ਅਠਾਈ (aṭāī) - twenty-eight

ਉਨੱਤਈ (unattī) - twenty-nine

ਤੀਹ (tīh) - thirty

ਇੱਕਤੀ (ikkatī) - thirty-one

How did I develop this? (1) I used Punjabi-English/English-Punjabi Dictionary and (2) Teach Yourself Panjabi.