document.write( "Question 578164: I am trying to figure out the combination on my safe that I forgot. I contacted a locksmith and my options are try to figure it out or as a last resort he has to drill the door. It is a 6 digit electronic lock. Gives you 2 tries then have to wait 5 minutes. I'm almost certain I used 581 which is part of a certain number of mine backwards. lol How can I figure out all the posible combinations to try? Thank you! My email is snowman800@lycos.com \n" ); document.write( "

Algebra.Com's Answer #370528 by dfrazzetto(283) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "With six digits, and the order is important (permutations) there could be many thousands of options.\r
\n" ); document.write( "\n" ); document.write( "where was the 581? the first 3 digits? the last 3? \r
\n" ); document.write( "\n" ); document.write( "Assuming the first 3 digits are 581 and 0 is allowed:\r
\n" ); document.write( "\n" ); document.write( "5 8 1 _ _ _\r
\n" ); document.write( "\n" ); document.write( "5 8 1 * 10 * 10 * 10, so there could be 10^3 = 1000 possible cominations\r
\n" ); document.write( "\n" ); document.write( "If you don't know where the 581 is in the sequence it could be \r
\n" ); document.write( "\n" ); document.write( "_ 5 8 1 _ _ \r
\n" ); document.write( "\n" ); document.write( "_ _ 5 8 1 _\r
\n" ); document.write( "\n" ); document.write( "_ _ _ 581\r
\n" ); document.write( "\n" ); document.write( "giving rise to 3 other sets of 1000, so 4 x 1000 = 4000 combinations in total \n" ); document.write( "

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