The number takes the opposite gender of the singular form of the noun. If the noun is masculine, the number takes a feminine ending ( Ta Marbuta ).
Mastering Tarkib 'Adadi is a rite of passage for students of Arabic. While the rules of gender opposition and case shifting may seem daunting at first, they provide a rhythmic and logical framework that defines the beauty of Arabic syntax. Whether you are translating media terms as discussed in ResearchGate or studying classical literature, a firm grip on these numerical phrases is indispensable.
For these numbers, the 'Adad follows the Ma'dud and acts like a standard adjective ( Sifah ). They must match the noun in gender and number.