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Four singers (Posted on 2018-03-26) Difficulty: 1 of 5
Four singers take part in a musical round of 4 equal lines, each fi nishing after singing the round through three times.
The second singer begins when the fi rst singer begins the second line,the third singer begins when the fi rst singer begins the third line,the fourth singer begins when the first singer begins the fourth line.

Find the fraction of the total singing time that all four are singing at the same time.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
GeneralizingSteve Herman2018-03-26 11:58:48
SolutionTrick or Treat? (spoiler)Steve Herman2018-03-26 11:44:46
SolutionIs it a "Trick" or not? (spoiler)Charlie2018-03-26 10:41:59
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