Posted by can u please help me! please on .
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 
Calvin Lin,
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