Question

The Green Line circles the station every 9 minutes. The red live circles the station every 6 minutes. If they leave the station together, how long will it be until the next time that they leave the station together again?

Please explain

A) 15 minutes

B) 18 minutes

C) 36 minutes

D) 54 minutes

Answer 1

D) Because if you do 9 *6 you get 54 minutes until the next time.