document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=908783>Question 908783</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If a red light flashes every 12 seconds and a yellow light flashes every 30 seconds, what second will the flash at the same time </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #551324 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=551324\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> They will flash together at the same time every 60 seconds, ie every minute.\r<BR>\n" );
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document.write( "Why 60? Because 60 is the LCM of 12 and 30\r<BR>\n" );
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document.write( "Multiples of 12: 12,24,36,48,<font color=\"green\">60</font>,72,84,96,108,120<BR>\n" );
document.write( "Multiples of 30: 30,<font color=\"green\">60</font>,90,120,240,270,300\r<BR>\n" );
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document.write( "Notice 60 is the smallest multiple they have in common.\r<BR>\n" );
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