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    A six digit code | 
  2016-05-06 | 
   
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  From Ralph: How many combinations are possible if a "safe" has four buttons and you can use a six digit code?  (these are just single press buttons..)For example, this could be one possible combination:  Button 4  Button 1  Button 1  Button 3  Button 2 Button 4.  Thanks! Answered by Penny Nom. | 
   
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