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imagine all the people are represented as dots on a circle. In this case, the 3rd dot should be 180 degrees away from the 10th dot. so on one side of the circle, there are 7 dots. by symmetry there should be 7 on the other side as well. so, there are 14 dots(people) around the circle.

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15y ago
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Q: If people are in a circle and the third person faces the tenth person how many people are in the circle?
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