There are five sales agents in a certain real estate office. One month Andy sold twice as many properties as Ellen, Bob sold 3 more than Ellen, Cary sold twice as many as Bob, and Dora sold as many as Bob and Ellen together. Who sold the most properties that month?

• Answer is Cary sold most of the properties during the month.
  
  Reason:-
  Andy = 2 * (Ellen)
  Bob = 3 + Ellen
  Cary = 2*(Bob) = 6 + 2 *(Ellen)
  Dora = Bob + Ellen = 3 +2*(Ellen)
  Andy : Bob : Cary : Dora : Ellen
  2(Ellen) : 3+Ellen : 6+2(Ellen) : 3+2(Ellen) : Ellen
  2(Ellen)-3 : Ellen : 3+2(Ellen) : 2(Ellen) : Ellen -3
  Therefore 3+2(Ellen) is the highest which is Cary.
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