Question

Use the subway train schedule below to answer the question.

Train Schedule
Train Arrives Every...
Red line 4 minutes
Blue line 5 minutes
Yellow line 6 minutes


All three trains just arrived at the station. When will they next all arrive at the station at the same time?

Answer 1

60 minute. All of the trains will arrive every 60 min because it is the LCM

Answer 2

60 minutes or 1 hour

Explanation:

4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60

5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60

6, 12, 18, 24, 30, 36, 42, 48, 54, 60