



 
Hi Stephanie, Suppose you keep track of the number of minutes after 8:00 am when the trains leave. The first train leaves at \[6, 2\times6, 3\times 6, \cdot, \cdot, \cdot \mbox{ and so on.}\] The second train leaves at \[7, 2\times7, 3\times 7, \cdot, \cdot, \cdot \mbox{ and so on.}\] What is the first number tat appears in both lists? What time is that? Penny  


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