I came across this site – which tests someone’s l33t h4x0r1n6 skillz.
Well actually real hacking isn’t as simple (and neither am I saying that the site is a piece of cake – I gave up on level 15, with no intention to finish it anytime soon). But the site is good practice for the eye and mind, as it makes you think of the common simple solutions to sometimes complex-seeming problems.
Think if it as an IQ quiz, as it doesn’t measure how well versed you are with programming languages, but simply tests your skills on analysis.