I agree that the 11+ was an unfair test. I passed, as did my brother and sister, and we went to the girls' and boy's grammar schools. There was only one for each sex.
I can clearly remember the humiliating way we were told. The teacher just pointed to each of us, saying, You've passed, you haven't.' I think about half the class passed.
The 11+ system only spanned about 25 years. As a child, I had assumed that the system was normal and had always been the same.
I was acutely aware that I wasn't at the top of the cleverness stakes when I went to the grammar school. But, the teaching was good, the teachers amazingly strict in comparison with today, and most people came out with a good clutch of O and A levels.