ANSWERS: 2
  • Yes. Run this Java code: public class NumberSeries{ public static void main(String a[]){ for(int i = 0; i < 10000; i++) if(i < 10) System.out.print("0"); if (i < 100) System.out.print("0"); if (i < 1000) System.out.print("0"); System.out.println(i); } } } or this php script: <? for($a=0; $a<9; $a++) for($d=0; $d<9; $d++) for($c=0; $c<9; $c++) for($b=0; $b<9; $b++) echo $a.$b.$c.$d; ?>
  • 4 digit combonations 0-9

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