Classical Arabic and Modern Standard Arabic display a gender mismatch with numerals -- gender polarity -- which is a Common Semitic feature found in at least some stage of all the branches of the Semitic family (see the description of Hebrew for a typical instantiation). In Egyptian Colloquial Arabic, however, numerals lack gender marking, and hence lack polarity.
References
Mitchell, Terence F. 1962. Colloquial Arabic: the living language of Egypt. London: The English Universities Press.