Regularly 7749

Three steamers leave the port. The first regularly returns after three months, the second after four, and the third after six months. How long before they meet again in the port?

Correct answer:

t =  12 m

Step-by-step explanation:

3 ...  prime number 4=22 6=23 LCM(3,4,6)=223=12  t=LCM(3,4,6)=12 m

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