Nielsen Market Analyst interview questions

I interviewed at Nielsen office in Hong Kong. First, a phone interview, inviting you to do an assessment test in their offices. The test includes 10 math questions, followed by 2 case-study. And one email writing. If you pass the test, the HR will do a brief interview with you. Then I waited about 2 days to be invited to the final round, which is a presentation interview. You will prepare a Powerpoint of a case study they gave you. You will do some analysis, and interpretation of the data. The overall presentation interview is okay, but the panel will keep trying to ask you detail question in the data to see how you understand they market. The instructions were like "you can choose only the data that you think is important to illustrate your point, and point that out". So I'm not sure if they want the candidate to construct graph and table herself or not, but all those information provided are already graphs and charts etc. Oh, and I had to complete another set of online assessment. That was more like IQ test in Chinese, English wording, spatial image, calculation etc. Very difficult. -Personality test as well