My lousy car has an odometer without 4s — in every position, the counter advances from 3 directly to 5.
For example, when it read 000039 I drove one mile and watched it roll over to 000050.
Today the odometer reads 002005.

How many miles has the car actually traveled?

Source: 2005 American Mathematics Competition

(In reply to Possible solution. by broll)

I'd call that a definite solution.

Posted by Charlie on 2016-06-02 09:09:32