document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1172340>Question 1172340</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine the number of possible 7-digit telephone Nos. if none f the first three digits<BR>\n" );
document.write( "(from left) can equal to zero and: (Solve each part separately) [4-Marks]<BR>\n" );
document.write( "a) Any digits can be used for the remaining numbers.<BR>\n" );
document.write( "b) The first digit must be odd, alternating thereafter between even and odd digits.<BR>\n" );
document.write( "c) All digits must be even.<BR>\n" );
document.write( "d) No digits can be repeated </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #797362 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=797362\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is 9*9*9*10000<BR>\n" );
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document.write( "9*9*9*5*5*5*5<BR>\n" );
document.write( "-<BR>\n" );
document.write( "9*9*9*5*5*5*5<BR>\n" );
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document.write( "9*9*9*10*9*8*7. <BR>\n" );
document.write( "(assuming for the last three problems that the restrictions apply only to the last four digits, otherwise the answers are very different.) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );