document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=869392>Question 869392</A>: <I><SPAN STYLE=\"word-break: break-all;\"> one light flashes once every 6 seconds,a second light flashes every 5 second s and a third light flashes every 15 seconds how many times will they flash at the same time in one hour.<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 #524169 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=524169\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> One light ----------6 sec\r<BR>\n" );
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document.write( "II light ------------12 sec\r<BR>\n" );
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document.write( "III light -----------15 sec\r<BR>\n" );
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document.write( "Take the LCM of 6,12,15\r<BR>\n" );
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document.write( "=30\r<BR>\n" );
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document.write( "every 30 seconds they flash together\r<BR>\n" );
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document.write( "in a minute 2 times\r<BR>\n" );
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document.write( "in 60 minutes 120 times </SPAN>\n" );
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