Last winter I was in the United Kingdom. Travelling by the train from London to Manchester, I had for company two middle-aged Englishmen who were seated opposite to me. Naturally, they did not speak to me – because we hadn’t been introduced. But I could not help overhearing their conversation.
‘How old is Tracy, I wonder?’ one asked the other. ‘Tracy!’ the other replied ‘Let me see – eighteen years ago he was three times as old as his son.’
‘But now, it appears, he is only twice as old as his son’ said the former.
I tried to guess Tracy’s age, and his son’s age. What do you think my solution was?