Quantitativer Analyst Interview Questions

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There are 10 open boxes containing 100 coins each. In 9 of these boxes the coins are made of gold, and in the other the coins are made of copper. You are given a large digital balance which can be used once only. Can you identify the box containing copper coins knowing the weight of both gold and copper coins?
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Quantitative Analyst

Interviewed at D. E. Shaw & Co. - Investment Firm

3.8
Feb 1, 2010

There are 10 open boxes containing 100 coins each. In 9 of these boxes the coins are made of gold, and in the other the coins are made of copper. You are given a large digital balance which can be used once only. Can you identify the box containing copper coins knowing the weight of both gold and copper coins?

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