Oh, sorry, that was the point, Husar jogged me: between perception of innate capacity and incapacity down to 'gross' or 'unusual' ignorance - ignorance of something that every normal person should have knowledge of. Something like that, will do for now.

Inability to do maths is associated with girls.
Is that the old prejudice or are you referring to scientific findings?

The argument that the school is designed for girls is nonsense. The school is designed for boys.
Do you mean that in the sense of 'designed for' or 'biased towards'?