Fidelity Investments Interview Question: How many pingpong balls could... | Glassdoor

Interview Question

Financial Analyst Interview Boston, MA

How many pingpong balls could fill a 747?

brain teaser

Interview Answer

2 Answers


There is no right answer. It's a logic and reasoning test.

Interview Candidate on May 16, 2009

Yes, it is a think out loud and reasoning test. Make it personal "I don't ever dial 411 because I'm cheap, but I know some do. My grandmother and my child couldn't do it, so if you eliminate all those types of people, you might be left with 200 million phone users in the US. If I am at work, I would Google first, so that has changed how people use phones. I suppose the 200 million people probably average 1 call per year, so 200 million calls."

So, without making a crazy answer like 10 time a day per person, it is a little hard to challenge.

PuddinHead on Mar 20, 2010

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