حَضَرَ عِشْرُونَ طَالِبًا.
Translation: Twenty students arrived.
حَضَرَ: past verb built on fatḥa.
عِشْرُونَ: nominative subject with wāw; a multiple of ten treated like the sound masculine plural.
طَالِبًا: accusative tamyīz with fatḥa; singular and indefinite.
Rule: The numeral's specification stays accusative regardless of the case of the numeral.
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Noun Case Classes: Type 6 — Sound Masculine Plural and Related Forms
حَضَرَ عِشْرُونَ طَالِبًا.
Translation: Twenty students arrived.
حَضَرَ: past verb built on fatḥa.
عِشْرُونَ: nominative subject with wāw; a multiple of ten treated like the sound masculine plural.
طَالِبًا: accusative tamyīz with fatḥa; singular and indefinite.
Rule: The numeral's specification stays accusative regardless of the case of the numeral.