Not sure about officer ones but I did ground trade ones. I don't think they're all that different, other than the topics.
Number one tip: Don't get stuck on an answer. If you have to think twice, literally pick one out of randomness. I actually did better in advanced maths than I did in basic maths because of the time frame. I didn't finish basic maths because they only give you like 2 minutes or something. I would have done better if I actually guessed the last 5 questions. (I still got all the others right, but if I had been a bit slower, I wouldn't have answered enough to get them right)
Just think about what they want, come up with an answer and if you have to go "oh wait, hang on" then don't worry, circle something and go onto the next one.
It was me and 3 others in my testing session. Only me and one other guy passed these tests which in my mind, were bloody easy

. People over-think and focus too much on 100% accuracy. Focus on finishing rather than getting them all correct.
In saying this though, make sure you get at least some correct
