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Google Brain-teaser

Tim Challies posted a link this morning to “15 Google Interview Questions That Will Make You Feel Stupid.” It turns out that Google is hiring again, and they like to ask hard questions in their interviews. In fact, you might say that their interview questions are like taking the GRE. Here’s one of the brain-teasers they use when interviewing product managers. See if you can figure it out before looking at my answer in the comment section. Let me know if you got it right.

You have eight balls all of the same size. Seven of them weigh the same, and one of them weighs slightly more. How can you find the ball that is heavier by using a balance and only two weighings?

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