I managed a mere 46%. However, I don't feel so bad about that since I rushed through it, didn't check my answers and misread a few as a result! And on one or two of the numerical ones I was only out by a margin (I mean, what's the difference bewtween 15 and 16 million under-19s unless you're a planning department of some variety?).
Odd mix of questions, some that seemed entirely reasonable, others that seemed irrelevant. However, if you think about it, there's a logic to some of them. For example, the utterly bizarre one about the year of women's right to divorce. Most of us won't know the answer, but some cultures and countries might not allow divorce at all, so putting the date in the test handbook is part of educating potential applicants about women's rights in the UK. The question seems stupid to us, but it's a subtle and rather important part of understanding British life.
Regards
Robin