Was it by any chance a Britannia assesment you went to!!!!! Because if so I can understand what you mean, although I was fortunate enough to pass it and get the job. However I did wonder about some of the other fantastic people their, some that had travelled from miles around, who were just sent away because they were not great at maths. And lets be honest, most airline use computers on board any way, and even if they break, I know I carry a calculator.
Do you think it could just be an excause to lower the numbers down a bit, because they can?