15 out of 15 for me, without a calculator I might add (and I didn't cheat)
(You have to assume they are using log base 10 of course)
However whether my top score is due to O level maths and further maths is unclear to me (I have since studied maths at much higher levels than this - having now attended 5 univerities now).
My latest adventure into the university system in 2008, which to my cost brought me two mental breakdowns in quick sucession; the first one from trying to study for an MSc in History of Science, Technology and Medicine, a course jointly organised by UCL, Imperial College and the Wellcome Trust, and then the second one in a failed attempt return to the same course (when my memories of the previous breakdown suddenly flared back).
Generally universities don't want to admit to, and are certainly not curious about the relatively common problem of, mental breakdowns induced by high pressure academic study.
It is easier apparently to classify people who succumb to mental health problems at university, as mentally weak or academically unsuitable, rather than have to admit openly to any failings in the university system itself.
(People complain about fees, but I have probably lost over £300,000 in savings and lost earnings over the last 4 years, trying to rebuild my sense of self and in coming to terms with what has happened to me. (Don't worry I haven't been claiming benefits, all I've had from the state over this four year period is a few hundred pounds of tax credits)
Anyway in pulling myself back from the dark abyss (twice now) I ended up playing with some maths I never did at school - number theory (at a very amateurish level indeed) - it sort of helped somehow. When failure hits, causality questioned and memories lost, it sort of helps when you start finding something in life you can actually do again.
So your maths knowledge may end up influencing and helping you in later life, in ways that you can now hardly imagine...
For me, having now done some amateur number theory, with nothing yet proved explicitly, I have sort of been led to contemplate the conclusion that the RSA public key cryptography system used to encrypt most of our secure communications on the web, is completely flawed and useless. I sort of now believe that fast factoring the product of two large primes is actually a trivially easy thing to do; something that any 15 year old (or clever 12 year old) could do in fact, if only they thought about the 2000 year old plus problem from an engineering perspective.
I have made a comment on the immense hubris of our current situation (re: cyber security) before, even though I am not knowledable as to the exact way our predicament evolved. In any case no one took any notice.
The National Security Agency (NSA) in America has been advising that we change over to another system of public key encryption since 2009.
(I know Hollywood tends to relentlessly give them a bad press, but most of this is probably exaggerated or unwarranted. It might be wise to start listening to them on this occasion.)
P.S. don't feel upset if you got a very low score in the Williams F1 maths test, there is always scope for improvement as long as you don't give up trying.