document.write( "Question 1173431: tudent was asked to form two-digit numbers using the following digits: 0,1,2,3,4,5,6,7,
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Algebra.Com's Answer #798684 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "\n" ); document.write( "            The solution by @ewatrrr is ABSOLUTELY WRONG.\r
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document.write( "First digit can be any of the 8 given digits from 1 to 8 inclusive.\r\n" );
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document.write( "    (notice that 0 (zero) can not be the first digit of a two-digit number).\r\n" );
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document.write( "Second digit can be any of the 9 given digits from 0 to 8 inclusive.\r\n" );
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document.write( "It gives us  8*9 = 72 potential candidates for two digit numbers.\r\n" );
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document.write( "From this amount, we should exclude two-digit numbers with repeating digits.\r\n" );
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document.write( "They are  11, 22, 33, 44, 55, 66, 77, and 88 - in all, 8 numbers must be excluded from 72.\r\n" );
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document.write( "It gives the ANSWER  72 - 8 = 64.\r\n" );
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document.write( "ANSWER.  There are 64 two-digit numbers satisfying to imposed conditions.\r\n" );
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