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प्रश्न
There are 12 students in a playground; 11 weigh exactly the same, but one of them is slightly lighter or heavier. There is a seesaw to determine who is the odd one out. Find out the minimum number of times the seesaw will be used.
अति संक्षिप्त उत्तर
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उत्तर
The minimum number of times is three. First, weigh four against four. Then, use the remaining weighings to isolate the odd student by mixing suspects with normal-weight students.
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