Actually we are the odd ones out in Europe really.
Using the vigesimal (by 20) form of counting or numbering has been around for a long while in Europe. In England we used to say things like �four score and ten� meaning 90 or �four score and seven� (87).
Twenty was used as a basis for counting and many of the �quar� words we use today stem from Latin roots and base 20 counting was even used in Mayan and Aztec civilisations.
Does Four and twenty blacKbirds baked in a pie ring any bells?
I'd be careful saxy_jag - coming from a country that thought 20 shillings in a pound with 12 pence in a shilling was a good idea we've not got too much room for criticism!
Now how many hundredweight in a long and a short ton?