Pretty well, you mean - if you want to score higher on many IQ tests. Here's one source of bias and sociological limitation that is proving stubborn: some demographic groups score lower on IQ tests whenever they think they are being tested. Others don't. It varies. Some groups score better in paper and pencil formats than in physical object formats, other don't. Some groups are affected more by time pressure, or scheduling details. But little of this is directly relevant to the Chicago Police recruit exam. That hasn't been vetted nearly as carefully as the standard IQ tests, for one thing, and is not (supposedly) a "general merit" exam but one particularly fitted to a job. Is it, really?