Apparently you are only required to get one of the thirty or so questions correct in the maths test!
Hard as it is to believe I know but I have been told by multiple sources that’s all you require! Not much weight is put on this piece of the puzzle for CX acceptance.
Now, my advice is simply to skip the first question in the test (which is the question above), as its probably the hardest question in the exam bank. If you get stuck on the first question for to long (thinking that the rest are going to be like that, which there not) you will waist to much time. Just skip the first question and move on, I did and answered 22 out of the 30 (or so) comfortably.