This is more of an &quot;IQ test&quot; and has the fallacies of an IQ test.<p>1. The sample was people that went to University Open Days.
They may not be interested to spend much time on answering.<p>2. It is the style of IQ question that you exclude the odd answers until you get the right one. If you are not familiar with IQ tests, you would pick one and get over with it.