document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=365595>Question 365595</A>: <I><SPAN STYLE=\"word-break: break-all;\"> mark can remember only the first 3 digits of his friends phone number, he also know that the number has 7 digits and that the last digit is not a 0. If mark were to dial all of the possible numbers and if it takes him 23 seconds to try each one, how long would it take it to try every possibility? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #260793 by </B><A HREF=/tutors/aboutme.mpl?userid=sudhanshu_kmr><B>sudhanshu_kmr(1152)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=sudhanshu_kmr><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=sudhanshu_kmr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=260793\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "here we have to find total numbers of 4 digits, where 0 is not on last.\r<BR>\n" );
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document.write( "total no. of possible numbers = 10 * 10 *10 *9 = 9000\r<BR>\n" );
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document.write( "time= 9000 * 23 seconds </SPAN>\n" );
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