document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=623187>Question 623187</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in a cercle i have 8 numbers, a mystery number then 26, 6, 21, 1,<BR>\n" );
document.write( "36, 16, and 16. What is the mystery number? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #391939 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=391939\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The numbers are...<BR>\n" );
document.write( "26, 6, 21, 1, 36, 16, 16, ...<BR>\n" );
document.write( "If you take the numbers in pairs, like this...<BR>\n" );
document.write( "(26, 6), (21, 1), (36, 16), (16, ?) you can see that the second number in each pair is the result of subtracting 20 from the first number of the pair.<BR>\n" );
document.write( "So for the last pair, (16 - 20) = -4 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );