Train A leaves a station every 16 minutes and Train B leaves every 17 minutes. If both trains just left the station simultaneously, how long until they do so again?  Choose the correct choice from the following options
A) 272 minutes  B) 304 minutes  C) 190 minutes  D) 70 minutes  E) 35 minutes
We have to find the LCM:   17 is a prime number which means the LCM of 16 and 17 has to be   16*17= 
<gadget id="calculator">  16*17</gadget>
<output>272</output>
272   Correct answer is 272 minutes.
<result>A</result>
Train A leaves a station every 16 minutes and Train B leaves every 17 minutes. If both trains just left the station simultaneously, how long until they do so again?