document.write( "Question 1173432: student 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 #798695 by ikleyn(52781) $\"\"$ $\"About$

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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 5 given EVEN digits 0, 2, 4, 6, and 8.\r\n" );
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document.write( "It gives us  8*5 = 40 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  22, 44, 66, and 88 - in all, 4 numbers must be excluded from 40.\r\n" );
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document.write( "It gives the ANSWER  40 - 4 = 36.\r\n" );
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document.write( "ANSWER.  There are 36 two-digit numbers satisfying to imposed conditions.\r\n" );
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