<PRE><B>Question 749783</B>
Two cars are speeding around the race track at different speeds. One goes around the track in two minutes; the other goes around the track in one minute and thirty seconds. How often does the faster car pass the slower car?
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1st car speed: 120 min per oval
2nd car speed: 90 min per oval
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Find the least common multiple:
120 = 2^3*3*5
90  = 2*3^2*5
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Least common multiple = 2^3*3^2*5 = 360
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Ans: The pass every 360 min or every 6 hours.
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Cheers,
Stan H.</PRE>