Holy crap this test was hard. 15 questions in 20 minutes, the kind of find-the-common-elements or find-the-sequence problems that can drive you nuts.

I think the person doing it is actually using the data for an experiment, so please don't discuss specific attributes of questions in the comments. But I think it's all right to post your score (which is apparently only given as a percentile rank). I'm interested to know what other people score on this.

Oh, and I found it via Ed Yong, who mentioned it in an entry about how a memory task can help improve fluid intelligence.