document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=868091>Question 868091</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a blue neon light blinks every 4 seconds. a red one blinks every 5 seconds. while a green one blinks every 6 seconds. how many times will they blink together in half an hour. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #523350 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=523350\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In order to solve, we first need to find the LCM (least common multiple) of 4, 5, and 6<BR>\n" );
document.write( "The prime factors are<BR>\n" );
document.write( "4: 2,2<BR>\n" );
document.write( "5: 1,5<BR>\n" );
document.write( "6: 1,6<BR>\n" );
document.write( "So the LCM is 60.<BR>\n" );
document.write( "That means every 60 seconds (1 minute) they blink together.<BR>\n" );
document.write( "There are 30 minutes in a half hour, so they blink together 30 times. </SPAN>\n" );
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