# How many races required to find out three fastest horses?

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There are 50 horses. We have to find out the fastest 3 horses. In one race maximum 5 horses can run. How many such races are required in minimum to get the result?

posted May 17, 2014
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In order to complete the racing competition, the London racetrack has to submit its top and the most famous three horses to win the competition. Due to a electrical storm, all the records are cleared and no one knows which horse holds the record. They all look identical and it becomes even more difficult to differentiate the horses. There are 25 horses in the London racetrack. But there can be only five horses at a time on the track. Due to the electrical storm, time recording is impossible.
What will the least number of races that can be conducted to find out the three fastest horses?

Raman is 45 years old and his mother Alka is 73 years old.

Can you find out how many years ago, his mother was three times his age?