Question 1131571
A single elimination tennis tournament is used to determine a champion from among 120 competitors. A competitor who loses one match is immediately disqualified. The number of matches needed in order to determine a champion is?
after 1st set of matches:: 60 survive
after 2nd set of matches:: 30 survive
after 3rd set of matches:: 15 survive
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7 matches leaves 8 survivers::
4 matches leave 4 survivers
2 matches leaves 2 survivers
1 match leaves 1 final winner
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Total # of matches:: 60+30+15+7+4+2+1 = 119 
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Cheers,
Stan H.