But this an admission exam to gifted class, not an independant qualification of the population. A gifted class is happier and healthier with 40% girls than with 20%, and so for the boys' own good it's beneficial to discriminate the genders.
We had 4 girls versus 20 boys in the 'one day a week' scheme of elementary school, than about 10 girls at 'Hanagid'. So one girl or two were definitely not gifted, while all the rest were very talented even if they were accepted in place of more intelligent boys.

Besides, girls are more mature than boys, so one can say he's just considering the applicant's social intelligence too.

Which, in the case of us hnanot, is quite useful. People in ordinary classes are generally less antipathic and more humane.

Humanity is over-rated - choose nuclear holocaust now.