10、Ants A, B, and C crawl at a speed ratio of $8: 6: 5$. They crawl along a circle from the same point and in the same direction at the same time. When they first return to the starting point together, the crawling ends. How many times does Ant A catch up with Ant B (including the end moment)?
10 Solution: (1) The speed ratio of ants A, B, and C is $8: 6: 5$, so, when they first return to the starting point at the same time, ant A has moved 8 laps, and ant B has moved 6 laps. (2) Ant A catches up to ant B once for every extra lap it moves, so, A catches up to B 2 times in total. Answer: When the three ants finish crawling, A catches up to B 2 times.