Sunday, March 23, 2008

Rank the 25 horses puzzle

Rank the 25 horses puzzle

You are given 25 horses, you need to rank them on the basis of their speed. They all run at the same speed everytime. Given that you can run only 5 of them at a time.

1: What do you think how many races to will it take to rank all of them from 1 to 25
2: how many races will it take to find out the fastest one?
3: how many races will it take find the top 5 fastest?

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