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Brain Teaser Interview Questions

Be prepared for technical questions and brain teasers! For these questions, employer's want to see how you think and your process of getting an answer - not necessarily the answer itself.


To answer

  1. Clarify the question (if possible, write it down)

  2. Take a minute to think it out

  3. “Think out loud” to your interviewer; it’s ok to use estimates (make it easy and use round numbers!)

  4. Focus on the thought process, not answer

  5. If you come up with multiple ways to solve, explain the other options as well

1. The “How Many [Things] Are There in [Location]?” Question

Example:


2. The “How Many [Things] Could Fit in [Container]?” Question

Example:


3. The “Do Some Quick Math” Question

Example:


4. The “Why Is [Common Item] [the Way Common Item Is]” Question

Example:


5. The “Explain [Concept] to a [Difficult-to-Explain-Concept Person]?” Question

Example:


6. The “Solve This Mystery” Question

Example:

“A windowless room has three light bulbs. You are outside the room with three switches, each controlling one of the light bulbs. If you can only enter the room one time, how can you determine which switch controls which light bulb?”


7. The “How Would You Do Something Ridiculous” Question

Example:



Adapted from this article.

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