完整答案请查看这篇文章: http://www.dailymail.co.uk/news/article-3127520/Are-smarter-Hong-Kong-grader-Logic-puzzle-Chinese-primary-school-exam-stumps-adults-6-year-olds-crack-just-20-seconds.html 

答案:87(提示:把它倒过来/转过来看)