There must be plenty of questions buzzing around peoples' heads that they just can't figure out the answer to. So let's have a few of them, and if you know the answer, quote the question and answer it! My Starter for 10: Why do fuel stations still display prices as xxx.9p per litre? Why isn't it rounded to the nearest whole penny? If I was to dispense exactly 1 litre how would I get my 0.1p change?