Question

1. A and B move clockwise around a circle,
starting from a common point O. A takes
9 minutes to complete a round but restarts
after a delay of 1 minute. B takes 13 min-
utes to complete the round but restarts af-
ter a delay of two minutes. How many
minutes after they began would they meet
again at O?
1. 30
2. 29
3. 31
4. 28
​

Answer 1

they meet same point at 28 min