A1numeral
عَشَرَة
ʿashara
ten
Example
قَرَأْتُ عَشَرَ صَفَحَاتٍ
qaraʾtu ʿashar ṣafaḥātin
I read ten pages
13 words from this root family
11 is unique: both parts agree in gender with the counted noun. أَحَدَ عَشَرَ (masc.) / إِحْدَى عَشْرَةَ (fem.)
12 is also unique: both parts agree in gender. اِثْنَا عَشَرَ (masc.) / اِثْنَتَا عَشْرَةَ (fem.). The first part declines as a dual noun.
For 13-19, the unit takes the OPPOSITE gender of the counted noun (reverse agreement), while عَشَرَ agrees with it.