Question

Yellow line leaves station every 6 min and red line leaves every 8 min and they both leave at 4:15, when will they both leave at the same time next 3 times?

Answer 1

Answer: $4:39, 5:03$

Step-by-step explanation:

Given

The yellow line leaves the station every 6 min

The red line leaves the station every 8 min

They both leave at $4:15$

Both trains meet again after, LCM(6,8)=24 min

i.e. at

$4:15+24=4:39\\4:39+24=5:03$