document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=771868>Question 771868</A>: <I><SPAN STYLE=\"word-break: break-all;\"> until recently U.S. telephone area codes were three-digit numbers whose middle digit was 0 or 1.codes whose last two digitsw are 1's are used for other purposes(for example,911).with these conditions how many area codes were available?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #470512 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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/cgi-bin/show-face.mpl?user=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=470512\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number of codes with 0 or 1 in the middle are:  \r<BR>\n" );
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document.write( "10*2*10 = 200\r<BR>\n" );
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document.write( "And codes used for other purposes are 10\r<BR>\n" );
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document.write( "Then the answer is 200-10 = 190\r<BR>\n" );
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document.write( "I can help you with more questions at: mthman@gmail.com\r<BR>\n" );
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document.write( "Thanks </SPAN>\n" );
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