document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163208>Question 1163208</A>: <I><SPAN STYLE=\"word-break: break-all;\"> There are 3 math books and 3 history books that are to be arranged on a shelf. How many different ways can the books be arranged on the shelf if 2 history books are to be kept together and 2 mathematics books are also to be kept together? The two math books should be immediately followed by the 2 history books and vice versa. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #787209 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=787209\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "We have seen this question before, and the answer is the same: the problem is nonsense.<br><BR>\n" );
document.write( "My guess is that whoever wrote the problem doesn't know what \"vice versa\" means.<br><BR>\n" );
document.write( "\"The two math books should be immediately followed by the 2 history books and vice versa.\"<br><BR>\n" );
document.write( "That means 2 math books should be followed the 2 history books, and the 2 history books should be followed by 2 math books.  That requires 4 math books (at least); but there are only 3.<br><BR>\n" );
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