7/10
Skimmed them though...so not bad considering..
http://www.theguardian.com/books/quiz/2011/jun/02/naipaul-test-author-s-sex-quiz
The Naipaul test: Can you tell an author's sex?
In an interview at the Royal Geographic Society this week, during which VS Naipaul provoked fury by suggesting that women writers are 'sentimental' and 'unequal to me', he also claimed that 'I read a piece of writing and within a paragraph or two I know whether it is by a woman or not.' Do you?
This one is a little less pop quizzy... and more practical... there are online tools that will attempt to guess the gender of an individual based on what they write, but sometimes they give inconsistent results.