This is where the rules become counter-intuitive. In this range, the relationship is usually a Tarkib Idhafi .
Thalathatu kutubin (Three books). Kutub (books) is masculine, so Thalathatu (three) is feminine. 3. Numbers 11 to 99 These numbers follow a Tarkib Tamyizi structure. tarkib adadi
For 11 and 12, both parts of the number match the noun's gender. For 13–19, the first part opposes the gender, while the second part (ten) matches it. Example: Ahada 'ashara kawkaban (Eleven stars). 4. Hundreds and Thousands These return to a possessive-style structure. This is where the rules become counter-intuitive
The counted noun must be plural and in the genitive case ( Majrur ). Kutub (books) is masculine, so Thalathatu (three) is
The phrase literally translates to "Numerical Composition." In Arabic, numbers do not simply act as static adjectives. Depending on the value of the number, the structure of the phrase changes significantly, affecting the gender, case ending ( i'rab ), and plurality of the counted noun.