Aptitude tests??? In 2013?
I thought aptitude tests for ATC were done away with over 10 years ago as they were shown to provide absolutely worthless, and possibly misleading, information about a candidate. If a controller does well or poorly on the test you still have no idea whatsoever of how they actually perform, not even a guide line.
It's just like having UFC fighters do written tests, what they put down on paper means ... nothing, nothing at all.