Answers

2014-04-21T12:33:25+05:30
Actually to find combination need to do this 10 * 10 * 10 ... * 10 = 10 ^10 = 1 billion for 10 digits = 1 billion 

then i tried next method f u have a graphic calculartor go to 16 ! the ! can be found under math and then probability 2 092 278 989 000 

for 16 digit 2 092 278 989 000 
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