Posted by **Bell** on Thursday, November 29, 2012 at 5:09pm.

An “A” train leaves a subway station every 12 minutes. An “E” train leaves every 9 minutes. If both trains just left the station on parallel tracks, when will both leave the station together again?

- Math -
**Steve**, Thursday, November 29, 2012 at 5:10pm
LCM(9,12) = 36

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