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March 30, 2017

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terrorists are trying to take over the world. They know the password to the weapon is 5 digits long and contains either 0 or 1, and either 2 or 3, and either 4 or 5, and either 6 or 7, and either 8 or 9. If the robots can enter 5 passwords per second, how long (in seconds) will it take them to go through all the possible passwords?

  • maths - ,

    This problem has been posted on Brilliant as a current problem in this weeks' Geometry problem set.

    I am unable to post an image or internet link to it.

    Please refrain from telling the OP the answer.

    I ask that moderators take this posting down.

    - Calvin Lin
    Brilliant Challenge Master

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