What is wrong with «رَأَيْتُ اثْنَا عَشَرَ طَالِبًا»?

Al-Murakkabāt — Compound Numerals, the Twelve Exception and Declining Baalbek

• Change طَالِبًا to طَالِبُونَ
• Change عَشَرَ to عَشَرُ
• رَأَيْتُ is a preposition
• «اثْنَا» must be «اثْنَيْ»