Joke Collection Website - Mood Talk - Now there is only one weightless balance.
Now there is only one weightless balance.
It's simple. Divide into three piles, 9 in each pile, and take any two piles. Put one side on each side of the balance, which side is light and the defective product is on the other side. If it is balanced, it means that the products put on the balance are all good, and the defective products are in the third pile (the pile without the balance). We can exclude 18 this time, leaving 9.
The second time, in the same way, nine people were divided into three piles and weighed once, and the search scope was narrowed to three.
The third time, too, determine which one is bad.
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