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10.4 (PMS)

Quiz by Jessi Farris

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5 questions
Show answers
  • Q1
    A lock has three wheels, each numbered from 0 to 9. If numbers can be repeated, how many possible combinations are there?
    30
    10
    1,000
    999
    300s
  • Q2
    The lock on a locker is numbered from 0 to 39. Each combination uses three numbers. The first and second number CANNOT be the same. The second and third number CANNOT be the same, but the first and third number CAN be the same. How many possible combinations are there?
    64000
    60840
    56316
    120
    300s
  • Q3
    A lock has four wheels. Wheel 1: 0-9; Wheel 2: A-J; Wheel 3: K-T; Wheel 4: 0-9. If numbers CAN be repeated, how many combination possibilities are there?
    8100
    40
    38
    10000
    300s
  • Q4
    How many passwords are possible if the requirement is six letters which CAN be repeated?
    36
    156
    244,140,625
    308,915,776
    300s
  • Q5
    A hacker uses a software program to guess passwords. The program checks 600 passwords per minute. What is the greatest amount of time it would take to guess a password made up of six letters that CAN repeat?
    460,880 minutes 20.5 seconds
    514,859 minutes 38 seconds
    406,901 minutes 3 seconds
    15.6 seconds
    300s

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