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You have nine balls which look all identical but there is one that weighs more than the others. You also have a balance which you can use to compare two items at a time. What is the least amount of times that you can use the balance to find out which one is the heaviest ball?
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Software Quality Assuarce1

Interviewed at Palantir Technologies

3.7★
Jun 23, 2010

You have nine balls which look all identical but there is one that weighs more than the others. You also have a balance which you can use to compare two items at a time. What is the least amount of times that you can use the balance to find out which one is the heaviest ball?

There are 4 people going through a bridge. One takes 5-min, one takes 1-min, one takes 2-min, and one takes 10-min. And only two people can go through once. Question: what is the shortest time that 4 people cross the bridge?
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Software Quality Engineer

Interviewed at MicroStrategy

2.8★
Mar 4, 2013

There are 4 people going through a bridge. One takes 5-min, one takes 1-min, one takes 2-min, and one takes 10-min. And only two people can go through once. Question: what is the shortest time that 4 people cross the bridge?

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