SOLUTION: Planets A, B, and C orbit a certain star once every 2, 7, and 12 months, respectively. If the three planets are now in the same straight line, what is the smallest number of month

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Question 335392: Planets A, B, and C orbit a certain star once every 2, 7, and 12 months, respectively. If the three planets are now in the same straight line, what is the smallest number of months that must pass before they line up again?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
2=2
7=7
12=2%2A2%2A3
The smallest number of months would be 2%2A2%2A3%2A7=84 months.