How to answer Elon Musk's favorite job interview question

SpaceX CEO Elon Musk likes to ask one riddle in particular when interviewing candidates for a position with his company, according to the book "Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future."

Here's the question and the answer so you can test whether or not you have what it takes to work for him.

Produced by Chris Snyder

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