QR is the tightest for timing. Realistically, unless you’re a savant at maths, it’s not going to be possible to answer all the questions in time and give them the attention they need.
Try taking the questions untimed. How many can you get perfect in the allotted time without struggling? That’s your target. See if you can maybe increase that by one set but try and learn to let questions go that you can’t work out how to do quickly and just answer them all the same and move on to the next set. You’ll be able to bank a lot more right answers that way. Flag the ones you answer this way and you can return later if you have time, maybe fixing any obviously wrong answers.
VR is more easily improved, in my view, as verbal reasoning relies on a smaller range of skills than QR. It can also be more realistically completed in the allotted time. AR can also be realistically improved because this one is about learning the techniques that they use to produce the questions (eg number, angles, placement, lines of intersection etc.). Like QR, though, you can learn to recognise which ones are unlikely to be possible in that brief amount of time you have.