document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=401106>Question 401106</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The triangular numbers are the whole numbers that are represented by certain triangular arrays of dots. \r<BR>\n" );
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document.write( "There is a triangular number that has 66 dots in its shape. Which one is it? Write your answer as a number. \r<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 #283919 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=283919\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 66 = 1+2+3+...+11, so the 11th triangular number is 66. </SPAN>\n" );
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