document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1133209>Question 1133209</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Since this question has an image, I'll post on in this link<BR>\n" );
document.write( "https://imgur.com/a/0rV2aw8  \r<BR>\n" );
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document.write( "I don't understand the actual answer in this question. Is there some concept to be learnt to answer this question? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #750404 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13198)</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=750404\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "Let's imagine a clock face and call the initial position of X and Y 3 o'clock.<br><BR>\n" );
document.write( "X moves counterclockwise at 1 revolution every 4 seconds, or 90 degrees per second.  So the times that X is at different places are the following:<br><BR>\n" );
document.write( "3 o'clock: 0, 4, 8, 12, 16, ...<BR>\n" );
document.write( "noon: 1, 5, 9, 13, 17, ...<BR>\n" );
document.write( "9 o'clock: 2, 6, 10, 14, 18, ...<BR>\n" );
document.write( "6 o'clock: 3, 7, 11, 15, 19 ...<br><BR>\n" );
document.write( "Y moves counterclockwise at 1 revolution every 6 seconds, or 90 degrees every 1.5 seconds.  So the times that Y is at different places are the following:<br><BR>\n" );
document.write( "3 o'clock: 0, 6, 12, 18, 24, ...<BR>\n" );
document.write( "noon: 1.5, 7.5, 13.5, 19.5, 25.5, ...<BR>\n" );
document.write( "9 o'clock: 3, 9, 15, 21, 27, ...<BR>\n" );
document.write( "6 o'clock: 4.5, 10.5, 16.5, 22.5, 28.5, ...<br><BR>\n" );
document.write( "Now look at the answer choices.  Answer A has X and Y both at noon at the same time.  Are there any times in the lists above when both X and Y are at noon? No.  So A is not the answer.<br><BR>\n" );
document.write( "Checking the other answer choices in the same way, you should see that answer choice C is the only one that shows possible positions of X and Y at some future time. </SPAN>\n" );
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