8、There are three athletes practicing running around a circular track that is 1000 meters long. Athlete A runs one lap every 4 minutes, Athlete B runs one lap every 5 minutes, and Athlete C runs one lap every 6 minutes. Now, the three of them start running clockwise from the same point at the same time. $\qquad$ minutes later, the three of them return to the starting point for the first time.
【Answer】 60
【Analysis】We need to find a number that is a multiple of 4, so that A can return to the starting point. Similarly, this number should also be a multiple of 5 and 6. By trying multiples of 6, we find that the smallest such number is 60. After 60 minutes, A runs 15 laps, B runs 12 laps, and C runs 10 laps, all returning to the starting point.