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Vandaag is het 29 March 2024

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Billiard-balls - logic puzzle

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Nine billiard-balls are lying in front of you. Except for one they all have the same weight. The exception is a little bit heavier than the others.
What is the minimal number of times you have to use a balance in order to find the wrong billiard ball?
billiard ball

Answer

Two times.