# Brain teaser Interview Questions

interview questions shared by candidates

## Brain teaser Interview Questions

Given a plot of land and $250,000, what can you do to maximize your revenue and what kinds of data would you look at to do so? |

There is a game where you have three coins, and your opponent has three coins. You both flip your coins at the same time. If the number of heads you have matches the number of heads he has, then you win $2. Otherwise you lose $1. Do you want to play this game? |

You have a building with 100 stories. You also have two glass balls. You can drop the glass balls as many times as you want before they break. How can you find the floor at which they start breaking with the fewest number of drops? |

If you have three people standing, all facing the same direction, each person can see the color of the hat of only the person directly in front of them (which can be either black or white). There are two hats of each color (four total). The hats are placed on the persons' heads one at a time, starting with the one in the very front. When someone knows for certain what color hat they have, they need to declare that they have discovered the color of their hat. In this scenario, no matter which hats are distributed, at least one person can be certain of their hat color. What are these scenarios, and what are the probability distributions for each? |

A single-elimination tennis tournament has n teams. How many games will be played before there is a winner? |

You have 2 identical crystal orbs and a 100 storey tall building. How do you determine which floor the orbs will shatter at, and what is the minimum number of tests you need to execute? |

Why is a manhole round? |

If you were a Cereal what kind of Cereal would you be? |

I was asked a great and interesting question that I will most likely use in my hiring process going forward that really demonstrates how one thinks and responds to a analytical problem. You have 9 balls and a balance, one ball is slightly heavier than the rest, with only 2 chances on the balance find that ball. The interviewer helps think through and everyone gets to the answer by the end but it really displays how someone works through a problem. |

classic fermi problem. estimate some value making some approximations. |

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