document.write( "Question 280949: To number the pages of a volume, 3001 digits were printed. Assuming all pages are
\n" );
document.write( "numbered, the number of pages is:\r
\n" );
document.write( "\n" );
document.write( "(A) 1021 (B) 1026 (C) 1027 (D) 1028 (E) none of these
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #204122 by Theo(13342)![]() ![]() You can put this solution on YOUR website! page numbers 1 to 9 = 1 digit per page * 9 pages = 9 digits total. \n" ); document.write( "page numbers 10 to 99 = 2 digits per page * 90 pages = 180 digits total. \n" ); document.write( "page numbers 100 to 999 = 3 digits per page * 900 pages = 2700 digits total. \n" ); document.write( "page numbers 1000 to 9999 = 4 digits per page * 9000 pages = 36000 digits total.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Since the total number of digits is 3001, then:\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "we ate up 9 digits to get from 1 to 9. \n" ); document.write( "we ate up another 180 digits to get from 10 to 99. \n" ); document.write( "we ate up another 2700 digits to get from 100 to 999.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "So far we used a total of 2700 + 180 + 9 = 2889 digits.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Since we need to eventually use a total of 3001 digits, we have 3001 - 2889 = 112 more digits to go, and all of these digits will have 4 digits per page.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If we divide 112 by 4, we get 28 pages to go.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "999 + 28 = 1027 pages in the volume.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "If I am correct, that would be selection C.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The fact that 112 divided evenly by 4 was a good sign.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "I would go with selection C.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "A built in assumption is that the page numbers start at 1 and not 0.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "this is a fair assumption I believe.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |