4 ms·

Is 7 the answer to the first question?

• male_salmon 18y ago
  Yes
• ecksor 18y ago
  no
• jcl 18y ago
  That appears to be the case. (http://answers.yahoo.com/question/index?qid=20070410145334AAnLNCT http://answers.yahoo.com/question/index?qid=20070410145334AA...)
• eru 18y ago
  Depends. If you equate horses with "real numbers all different from another", than 7 is the best I can get down to. Haven't proved optimality, yet, though. (But obviously you'll need at least 5 races, so that every horse has been raced at least once.)