As mentioned, there is not a set score that is considered good on an aptitude test - it depends entirely on what the recruitment team is looking for.
However, it is worth bearing in mind that when you are being assessed, your results are being compared to other applicants and a range of other test takers, so you need to perform better than them to be in with a stronger chance of success.
Aim high to give yourself the best shot at getting taken through to the next round.