Here's little time-teaser for you to try to work out. Taxi drivers know you don't like maths, you gave the game away by being unable to add a tip to the fare. But not to worry, have a little go anyway. If your train is leaving in just under 15 minutes and the station is a 20 minute journey away - when traffic is good - then by how many minutes will you miss your train? For anyone who answered anything other than 'at least five minutes', think on this: If taxis really were capable of breaking the laws of physics, do you not think they'd be put to slightly better use?