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)![]() ![]() You can put this solution on YOUR website! 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. \n" ); document.write( " |