Hi, Ali. I like your article about mathematical problems that can make someone rich. I appreciate your explanations and thank you for the scholarly effort to make the arcane clear. A very long time ago I remember a teacher wrote out the Reinmann Hypothysis and mentioned the reward for its solution. I can still see this dimuitive woman with greying hair setting out the equation on the black board. It was a hot summer's day, the windows in the classroom were open, and the girl sitting next to me passed a note. On the weekend, I went to the library and took out several books on mathematics to help. Needless to say, I did not solve the problem, but spent some time trying to answer the riddle. Thanks; Regards.