document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1116107>Question 1116107</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what number is needed to complete the pattern\r<BR>\n" );
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document.write( "66 73 13 21 52 __ 10 20 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #730980 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13200)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=730980\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "What pattern?<br><BR>\n" );
document.write( "That's not a smart-aleck answer.  It's the best I (or anybody) can do.<br><BR>\n" );
document.write( "The only way to answer the question (or any question like it) is to ask the person who wrote the problem what the pattern is.<br><BR>\n" );
document.write( "You can put any number you want in the blank and it will be a valid sequence.<br><BR>\n" );
document.write( "Presumably there is a logical pattern that was used to create the problem.  But there are probably other logical patterns in the given numbers which would produce a different missing number.<br><BR>\n" );
document.write( "So unless a problem like this tells you something about what kind of pattern to look for, it is a waste of time. </SPAN>\n" );
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