Question

Airport offers 2 shuttles that run on different schedules.if they both leave airport at 4:00 p.m. what time will they next leave the airport together, one departs every 6 min and the other every 9 min

Answer 1

basically have to find the lowest common multiply of 6 and 9.

The LCM of 6 minutes and 9 minutes = 18 minutes

so if they both leave at 4:00 p.m., they would then both leave at 4:18 p.m.