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There are 9 balls one of which is lighter than the others. How would you find the lighter ball in 2 tries


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hint. group balls in groups of 6, 2, and 1 .

Anónimo en


Roll them and see which ones rolls the furthest

Anónimo en


#1: Place on a balance scales 2 groups of 3 balls. If they weigh the same then the lighter ball is in the remaining group of 3, otherwise it is in the lighter group on the scales. #2: With the group that contains the lighter ball, place 2 of the balls on the scales. If they weigh the same then the remaining ball is the lighter one otherwise it is the lighter ball that is on the scales.

Anonymous en


Divide the ball into groups of 3

Anónimo en


an87 en

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