There are 25 horses and five tracks. There is no stop clock
and we have to find the top 5 horses in the bunch. What is
the minimum possible races ?
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Answer Posted / sai krishna
Total races = 10
Firstly divide the horses into five groups
A,B,C,D and E
Those are 5 races. In these five races we get
A1 A2 A3 A4 A5
B1 B2 B3 B4 B5
C1 C2 C3 C4 C5
D1 D2 D3 D4 D5
E1 E2 E3 E4 E5
Assume 6th race is between
A1 B1 C1 D1 E1
here we get one horse as winner.It is 6 th race
If A1 is winner in that position A2 will be placed and again raced. It is 7th race
LIke that another 3 horses to be placed to get top 5.So 3 races will occur.
So totally 5 + 1 + 1 + 1 + 1 + 1 = 10 races.
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