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by William Armstrong
13 Apr 2013
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Orbits Puzzle

Genre: Math Puzzle Rating: 4 - Medium Source: Unknown
Brain Functions: Logic / Exact Calculations Hint    Solution

We've discovered a star with three planets orbiting around it. Eta orbits the star every 90 days. Nu's orbit around the star takes 45 days. And Mu orbits the star in 30 days. At this moment the planets and the star are aligned in a straight line. When is the next time that the planets and the star will be aligned in a straight line again?

Orbits Puzzle

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