Math Is Fun Forum

Hannibal lecter

Member

Registered: 2016-02-11

Posts: 392

Hello

I have this lock:
a 3 dials combination I want to open it I forger the password

I want the full number list to try them all please they said it's 1000 numbers

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Wisdom is a tree which grows in the heart and fruits on the tongue

Bob

Administrator

Registered: 2010-06-20

Posts: 10,140

Re: Hello

hi Hannibal lecter

If you count  000, 001, 002, ... 999 that is 100 numbers.  Won't take too long to try them all.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

CurlyBracket

Member

From: Your Maths Textbook

Registered: 2022-01-03

Posts: 151

Re: Hello

Hi Hannibal Lecter,

I assume that the digits of the three rows are independent of one another, and only one combination can be used to unlock the lock.

Therefore we can treat it as a nine digit number.

Starting right from 000 000 000 upto 999 999 999, there are 10^9 different combinations.

Hope that helps!

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Learning is fun - Exceptio probat regulam!