Finding the heavier ball

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United States Khan Academy
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8,990,000
Published on ● Video Link: https://www.youtube.com/watch?v=0Jgow5x09qw


Duration: 5:54
62,186 views
433

You have 9 balls that look identical, but 1 is heavier than the rest. What is the minimum number of weighings on a scale to determine the heavy ball?



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