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This web page math-homework-questions.blogspot.com states the following, "See math questions getting answers and get your own questions answered." We saw that the webpage said " Thursday, March 18, 2010." It also said " The Big Riddle of Four. After a long dry period, Im going to publish just one post here, and it contains a riddle for you, without my solution. Today is a very special day for me well, its my birthday, so Im giving you the opportunity to solve something truely difficult. Use the number 4 twice to get 64. X 4 64, but it contains the digit 2, which is unacceptable. Tuesday, July 29, 2008. Sin α sin β ."