جَاءَ اثْنَا عَشَرَ طَالِبًا.
رَأَيْتُ اثْنَيْ عَشَرَ طَالِبًا.
مَرَرْتُ بِاثْنَيْ عَشَرَ طَالِبًا.
Twelve students came; I saw twelve; I passed by twelve.
The first part has dual-style case endings: ithnā (nom.) and ithnay (acc./gen.).
The second part is fixed; the counted noun is singular accusative.
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Twelve: The First Part Declines
Number Nouns: Rules from One to One Thousand
جَاءَ اثْنَا عَشَرَ طَالِبًا.
رَأَيْتُ اثْنَيْ عَشَرَ طَالِبًا.
مَرَرْتُ بِاثْنَيْ عَشَرَ طَالِبًا.
Twelve students came; I saw twelve; I passed by twelve.
The first part has dual-style case endings: ithnā (nom.) and ithnay (acc./gen.).
The second part is fixed; the counted noun is singular accusative.