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Read the statement below. The task is given within the statement itself.
They are three errirs in this question. Can you find them ?
Hint: While first 2 errors can be easily spotted for the third one you need to think little more. Pay attention what statement is suggesting.
Errors listed here!
But what was the statement?
Here is 'that' statement once again.
They are three errirs in this question. Can you find them ?
1. They ......Should be There.
2. errirs......Must be spelled as errors.
3. The statement states 3 but there are only 2 errors.
There are 25 horses among which you need to find out the fastest 3 horses. You can conduct race among at most 5 to find out their relative speed. At no point you can find out the actual speed of the horse in a race. Find out how many races are required to get the top 3 horses.
Click here for logical answer!
Source
What was the task?
First we need to make 5 groups of 5 horses each. Let's put each group on race & note down rank of each horse & corresponding group. This requires 5 races.
Taking out winner of each group aside. In a next race, winner of each group run & fastest winner is found. Total 6 races are conducted till now.
Now let's name group of fastest winner as A, second fastest winner as B & so on as C, D, E. Each horse would be identified by it's group name & rank as Group.Rank. For example, B.3 means the horse that came 3rd in group B & D.5 is horse that came last in group D.
For next race, we can eliminate few. Let's remind we have to find 3 fastest horses. Now let's logically eliminate few horses. Those horse for which we are sure that at least other 3 are faster than those will be eliminated.
1. Now A.1, B.1 & C.1 are faster than D.1 & E.1. So D.1 & E.1 & respective groups eliminated straightaway.
2. The C.2 (& other members of C) eliminated as A.1, B.1, C.1 are faster ones.
3. The B.3 (& other member of B) eliminated as at least A.1, B.1, B.2 are faster ones.
4. Similarly, A.4 & A.5 have 3 horses ahead as A.1, A.2 & A.3.
5. A.1 is already proved it's fastest among all, so no need to re race by taking it.
