One of the good things about these tests is that they look for more than mathematical ability in an academic sense. The math is extremely basic after all. They test speed of assimilating data, composure under pressure, practicality, logic, common sense, spacial ability, etc. All important in day-to-day business.I also got a C at A-Level Maths. So, if you ask me how to do integration, I will look at you blankly. However, I recently took an SHL numerical test and scored in the 99th percentile, benchmarked against a peer group of chartered accountants - not exactly bad with numbers, one would imagine.Suck it up mate. You've proven yourself good at memorising formulae and procedures at Cambridge. Welcome to the real world. I'm not suggesting you lack ability. If you apply yourself, I'm sure you'll get 100% in the next test. I simply suspect you've been a bit cocky.