[einzlr]

Ok, I'll try to be a little more serious this time. Ahem. There are numerous reasons for this:

- it's a compromise to keep both parties happy (or both equally unhappy);
- it's done to give school teachers a source of material for math problems (e.g. convert all measurements for the following tire to metric);
- it was started by an impish little elf who takes delight in watching humans scratch their heads over questions which seem simple enough but in fact have no answer;