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Q 1/5
Score 0
A lock has three wheels, each numbered from 0 to 9. If numbers can be repeated, how many possible combinations are there?
300
30
10
1,000
999
Q 2/5
Score 0
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?
300
64000
60840
56316
120
5 questions
Q.
A lock has three wheels, each numbered from 0 to 9. If numbers can be repeated, how many possible combinations are there?
1
300 sec
Q.
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?
2
300 sec
Q.
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?
3
300 sec
Q.
How many passwords are possible if the requirement is six letters which CAN be repeated?
4
300 sec
Q.
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?
