Piper Jaffray
2.8 of 5 53 reviews
www.piperjaffray.com Minneapolis, MN 1000 to 5000 Employees

Piper Jaffray Technology Interview Question

I interviewed in Minneapolis, MN and was asked:
"One of the fun questions is that there are 9 balls. How to pick up one with odd weight in just 2 comparisons?"
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Clarification: 9 balls have the same shape. One is heavier than the others.
Ans: Separate them into 3 groups of 3. Then, you can pick the one in just 2 comparisons.
The trick is not to get trapped in binary thought.
- Interview Candidate on Jul 2, 2012 Flag Response

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