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Interview Question Database

You have 2 jars, 50 red marbles and 50 blue marbles. A jar will be picked at random, and then a marble will be picked from the jar, how can you maximized the chances of a red marble being picked ? What are the exact odds of getting a red marble using your scheme?

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How many pennies would fit into this room? How would you find out?

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The interviewer would be interested in how you would approach the problem. Would you ask additional clarifying questions? (empty room vs with furnishing), and your process to solve.

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There are four dogs/ants/people at four corners of a square of unit distance. At the same instant all of them start running with unit speed towards the person on their clockwise direction and will always run towards that target. How long does it take for them to meet and where?

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