Question

1. a b and c start at the same time in the same direction to run around a circular stadium. a completes a round in 252 seconds b in 308 seconds and c in 198 seconds all starting at the same point. after what time will they again at the starting point ?

Answer 1

Lcm of 252,308,198=2772 sec.
So they meet again after (2772/60)min.