I see people posting quizzes on other subjects, so I thought that I will post a couple of problems related to survey. This one is taken from a publication by Bruce R. Harvey. He took this from an article published by R. B. Horner. I believe Mr. Horner published a number of challenging problems that needed sharp analytical skills before the age of CAD. I don't think a problem like this can come in the survey exam but thinking about, at least that is my hope, will help me develop better skills.