If the sum of 19968 and 22235 is expressed as 0063, and the product of 20108 and 19977 as 0362, then how would the difference between 20845 and 20116 be rendered?
At the moment this is the extent of my thoughts:
Add Mult Subt 19968 20108 20845
22235 19977 20116 42203 0063 401697516 0362 729 ??
I had initial thoughts of keypad messaging (SMS) but the "0" bothers me [I'd have been more comfortable with accepting/dismissing that thought
if I was a user of that technology].
I considered the possibility of a ring/modulus approach but those leading zeroes become an issue.
Since the first two processes yield a 4 digit numeric representation one might assume that the last is to be so represented. Do we have a base (certainly not hexadecimal) where only the decimal digits of that base are used?

Posted by brianjn
on 20110212 20:18:32 