Sorry to have to rant about those bloody tests again, but they are NO indication whatsoever of whether you will make a good pilot. They are, purely and simply, a way of reducing numbers for the next round. This applies to all the aptitude tests for airline training schemes.
At the end of the day, if you can do simple arithmetic (ie 3 times table and reciprocal headings) that is all you will ever use. I mean, are you really going to work out the area of an equilateral triangle whilst you are flying? If you are, then I suggest that you may be missing something more important - like situational awareness and that mountain straight ahead of you!
The days of having to take star sightings and then work out your position in the universe using complicated formulae are long gone. I freely admit that I am terrible at maths, and always have been, but it has had zero effect on my flying ability. I even managed to pass Perf A first time - nightmare though it was.
The end point of this ramble is that you should not despair if you fail the selection tests, it does not mean that you are destined never to fly

Unfortunately, if you want to get sponsored then you have to suffer them.
Keep your chin up