This math question from an admissions test for an elementary school in Hong Kong is going viral in China.According to ChinaSmack, it was the second-most-popular post on Chinese microblogging site Sina Weibo on June 5, when it was published.The question was part of an admissions test for first-graders. They had 20 seconds to answer. Can you solve it? via ChinaSmack Stumped? Scroll down for the answer.