Summer Research Interview Questions

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There is a machine that makes 8 balls. All of them are identical, except for one ball that weighs slightly more (if you held the ball, you wouldn't be able to tell the difference). You have a two-pan, balance scale that you can only use twice. How would you find the heavier ball?
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Investment Banking Summer Analyst

Interviewed at SunTrust Robinson Humphrey

3.6
Dec 20, 2013

There is a machine that makes 8 balls. All of them are identical, except for one ball that weighs slightly more (if you held the ball, you wouldn't be able to tell the difference). You have a two-pan, balance scale that you can only use twice. How would you find the heavier ball?

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