Tourist.
Sorry mate, I simply disagree entirely. I found doing loads of mental gymnastics etc as a pre-cursor to aptitude tests really helpful. As far as science goes I cannot say if i would have passed had i not done so - as i passed first time. I do however know of plenty of mates who brushed up a little having failed and got through second time. i stand by my advice, brush up before hand. Empirical evidence shows that it could well help.
And even if it only makes a 1% difference, that could be the 1% between this wonderful world of ours and bitter disppointment.
Best of luck with the tests.