Re(1): Listener 4354: Taxi! By Ilver IP: 188.8.131.52 Posted on August 2, 2015 at 11:33:52 AM by Derek Harrison
I really liked this puzzle. I located the theme quite quickly but found the use of the key number very tricky. I tried several methods before finding the message.
Though not a mathematician I seemed to know the story of the taxi cab. I then remembered that it had appeared in an earlier Listener. In fact, the same theme appeared in Disagreement by Stan which was published in 2009. Replies: