Middle School:
Question: Callisto, Europa, Ganymede, and Io are moons of Jupiter. Ganymede is not the farthest moon from Jupiter. Callisto's orbit is not the closest orbit to Io's. Europa is closer to Jupiter than Ganymede is. Io is the closest to Jupiter. What is Jupiter's farthest moon?
Answer: Callisto
Solution: Right off the bat, we know that Io is the closest and Ganymede is not the farthest. Next, we can deduce that Europa is the second closest because that’s the only possible way for it to be closer to Jupiter than Ganymede, which must therefore be third. That leaves Callisto, which must therefore be the farthest. Tip: Use a logic table to keep track of the information.
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