Jack and Lee walk around a circular track. It takes Jack and Lee respectively 6 and 10 minutes
to finish each lap. They start at the same time, at the same point on the track, and walk in the
same direction around the track. After how many minutes will they be at the same spot again
(not necessarily at the starting point) for the first time after they start walking? Choose the correct choice from the following choices.
A) 15  B) 16  C) 30  D) 32  E) 60
Experimenting with the numbers in turn, dividing 6 into 15 and 10 into 15, we get   answers one whole number apart, so they are together again at 15 minutes.   correct answer 15
<result>A</result>
Jack and Lee walk around a circular track. It takes Jack and Lee respectively 6 and 10 minutes
to finish each lap. They start at the same time, at the same point on the track, and walk in the
same direction around the track. After how many minutes will they be at the same spot again
(not necessarily at the starting point) for the first time after they start walking?