Two cyclists were going to race It takes Mary 6 minutes to r

Two cyclists were going to race. It takes Mary 6 minutes to ride around the track once. It takes Mike 4 minutes to ride around the track. How many minutes will pass between each of the times that Mike passes Mary?

It would be the common multiple: 12, 24, 36 etc min
:
In 12 min, Ma would complete 2 laps, and Mi would complete 3 laps
:
Every 12 min then