document.write( "Question 980794: How many 3-digit numbers have the units digit larger than the tens digit? \n" ); document.write( "
Algebra.Com's Answer #601891 by macston(5194)\"\" \"About 
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From x00 to x00 there are 9
\n" ); document.write( "from x10 to x19 there are 8
\n" ); document.write( "from x20 to x29 there are 7
\n" ); document.write( "from x30 to x39 there are 6
\n" ); document.write( "from x40 to x49 there are 5
\n" ); document.write( "from x50 to x59 there are 4
\n" ); document.write( "from x60 to x69 there are 3
\n" ); document.write( "from x70 to x79 there are 2
\n" ); document.write( "from x80 to x89 there are 1
\n" ); document.write( "from x90 to x99 there are 0
\n" ); document.write( "Total per each hundred = 45
\n" ); document.write( "There are 9 possible digits for x, so 9 x 45 = 405
\n" ); document.write( "ANSWER: There are 405 3 digit numbers whose units digit is greater than the tens digit.
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