"David Lang" wrote in message
.uk...

Al Reynolds wrote;

You will think that I am slightly sad for having noticed
this, but on pondering the 13.5% extra free offer on some
beer cans, I realised that:
440ml + 13.6% = 500ml (0.5 litre)
500ml + 13.6% = 568ml (1 pint)

I can't believe this is a coincidence.

Neither can I. But why 13:5% extra free? Another odd figure! Why not
10% or 15%?

The plot thickens.................


Once the production lines are set up for 440ml and 500ml cans then giving
13.6% extra is the obvious choice. Doesn't explain why 440ml in the first
place though...