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 / dharshanah n
Totally there are 25 horses.
First round:-
Race 5 horses. Take the top 3. So totally 5 horses raced
Second round:-
Race the top 3 from 1st round + another 2 . So now totally 5+2=7 horses raced. Take the top 3 from this race too
Third round:-
Race the top 3 from second round + another 2 . So now 7+3=10 horses raced
If you keep going like this , in every round you get the top 3 of pervious round and add 2 more horses and race them together
So the number of rounds would be
first - 5
second - 2
third- 2
fourth - 2
fifth - 2
sixth - 2
seventh - 2
eighth - 2
ninth - 2
tenth - 2
eleventh - 2
Totally all 25horses raced. So in the eleventh round , the top 3 horses will be the top 3 among them all
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