Math problem about barking dogs

Answer this math problem about barking dogs before everybody else and stand out from the crowd. Use the Facebook comments tool below to type your solution to the problem. The winner must show the math behind the solution.

Math problem:

Five dogs in a neighborhood were barking consistently last night. The names of the dogs are Lucy, Max, Murphy, Daisy, and Sam. The dogs started barking at 10 P.M.
Then, Lucy barked every 5 minutes, Max barked every 3 minutes, Murphy barked every 4 minutes, Daisy barked every 3 minutes, and Sam barked every minute. Why did Mr. Smith suddenly awaken at 11 P.M.?

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