document.write( "Question 1050011: Using the digits 0-9, how many six digit numbers can be formed if no digits can be repeated? \n" ); document.write( "

Algebra.Com's Answer #665614 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "Using the digits 0-9, how many six digit numbers can be formed if no digits can be repeated?
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document.write( "1.  Any of the digits from 1 to 9 in the leftmost position.         9 options.\r\n" );
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document.write( "2.  Any of remaining 9 digits in the next to the right position.    9 options.\r\n" );
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document.write( "3.  Any of remaining 8 digits in the next to the right position.    8 options.\r\n" );
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document.write( "4.  Any of remaining 7 digits . . .                                 7 options.\r\n" );
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document.write( ". . . . And so on . . . \r\n" );
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document.write( "6.  Any of remaining 5 digits in the rightmost, 6-th position.      5 options.\r\n" );
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document.write( "In all, there are 9*(9*8*7*6*5) = 136080 such numbers.\r\n" );
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