SOLUTION: A PIN consists of 4 digits.. For extra security, a bank requires that the 4 digits (1) not be all the same [suchas 0000] (2)not be a repeated pair {suchas 7373] (3) not be a conse

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: A PIN consists of 4 digits.. For extra security, a bank requires that the 4 digits (1) not be all the same [suchas 0000] (2)not be a repeated pair {suchas 7373] (3) not be a conse      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 39548: A PIN consists of 4 digits.. For extra security, a bank requires that the 4 digits (1) not be all the same [suchas 0000] (2)not be a repeated pair {suchas 7373] (3) not be a consecutive increasing/decreasing sequence (suchas 3456 or 3210, where 0 is considered the smallest digit so 7890 is not consecutive). Howmany
different PINs are possible?
Answer by benni1013(206) About Me  (Show Source):
You can put this solution on YOUR website!
The answer is a permutation (9,4) 9*8*7*6 will be your answer.