Soundwise
How about octal? 3740.03.107
Or binary 
11111100000.11.1000111
Or they could keep us guessing by using a
different numeral system each time...
traditional Welsh vigesimal, anyone? I make it:
dwy fil un ar bymtheg . tri . un ar ddeg a thrigain It's got a nice ring to it, you have to admit! And so easy to remember...