A three 0-9 tumbler lock

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Question from Louis, a parent:

Dear Sir/Madam,

I recently gave my daughter an old briefcase which uses a three 0-9 tumbler lock. She set the lock and now she can't open one side.
Q. Is there a 3 digit combination number generator available to give me the 1000 possibilities?

Thanks,

Lou

PS In this type of lock you can repeat the same digit three times.

Hi Louis,

They are the 1000 integers from 0 to 999 if you allow yourself to write leading zeros. In other words they are

000
001
002
.
.
.
009
010
011
012
.
.
099
100
101
102
.
.
.
199
200
201
.
.
999

Penny

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