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January 29, 2015

January 29, 2015

Posted by **Najmah** on Tuesday, February 19, 2013 at 3:46pm.

An "A" train leaves a subway station every 13 minutes. An "E" train leaves evry 9 minutes. If both trains just left the station on parallel tracts, when will both leave the station together again?

- Math 6th grade -
**Steve**, Tuesday, February 19, 2013 at 3:50pmSince LCM(9,13) = 9*13 = 117

After 117 minutes,

9 A trains will have left,

13 E trains will have left

and then the cycle starts over.

Trains run on tracks, not tracts.

- Math 6th grade -
**ashley**, Tuesday, February 19, 2013 at 7:03pm117minutes

- Math 6th grade -
**Alissson**, Tuesday, February 19, 2013 at 9:56pmSince LCM(9,13) = 9*13 = 117

After 117 minutes,

9 A trains will have left,

13 E trains will have left

and then the cycle starts over.

Trains run on tracks, not tracts. ~Alisson~

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