Posted by Christina on Friday, October 26, 2012 at 7:13pm.
Ann and Bob are cycling on a track. Ann completes one lap every 15 seconds, and Bob completes one lap every 18 seconds. When will Ann lap Bob, assuming that they started together?

math  Anonymous, Sunday, April 13, 2014 at 6:59pm
60

math  Anonymous, Tuesday, December 15, 2015 at 3:44pm
90 seconds
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