document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=76086>Question 76086</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A telephone number consist of seven digits the first three representing the exchange. How many different telephone numbers are possible with in the 537 exchange? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #54619 by </B><A HREF=/tutors/aboutme.mpl?userid=Cintchr><B>Cintchr(481)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Cintchr><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=54619\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The last 4 digits determine how many numbers there are in the exchange.<BR>\n" );
document.write( "0000<BR>\n" );
document.write( "0001<BR>\n" );
document.write( "0002<BR>\n" );
document.write( "0003 ....<BR>\n" );
document.write( "9996<BR>\n" );
document.write( "9997<BR>\n" );
document.write( "9998<BR>\n" );
document.write( "9999\r<BR>\n" );
document.write( "\n" );
document.write( "Because this involves INCLUSIVE numbers, we subtract the first number from the last and then ADD 1.  The reason we add one is that we have in INCLUDE the fisrt one.<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+9999+-+0000+%2B+1+=+10%2C000+ ALIGN=MIDDLE  ALT=\"+9999+-+0000+%2B+1+=+10%2C000+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "So you can see that this really works, lets look at a simpler problem:<BR>\n" );
document.write( "You are supposed to read pages 1 - 5 in your history book.  How many pages dod you read?\r<BR>\n" );
document.write( "\n" );
document.write( "1<BR>\n" );
document.write( "2<BR>\n" );
document.write( "3<BR>\n" );
document.write( "4<BR>\n" );
document.write( "5<BR>\n" );
document.write( "A total of 5<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+5+-+1+%2B+1+=+5+ ALIGN=MIDDLE  ALT=\"+5+-+1+%2B+1+=+5+\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );