How many possible code combinations are there for this kind of lock?
999
1000
9999
10000
The possible codes are from 0000 to 9999 inclusive. There are 10 possibilities for each ring, thus there are 10*10*10*10 possible codes.
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Mathematics quiz
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Answers by country
999
1000
9999
10000
answers
Austria
23
Switzerland
17
Germany
149
Pakistan
16
Australia
18
France
11
Unknown
17
the United States
168
Poland
12251
India
105
the Netherlands
15
Canada
10
Greece
14
the Philippines
21
the United Kingdom
74
Ghana
11