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A wizard placed ten cats inside a magic circle as shown in our illustration, and hypnotized them so that they should remain stationary during his pleasure.
He then proposed to draw three circles inside the large one, so that no cat could approach another cat without crossing a magic circle.
Solution
The illustration requires no explanation.
It shows clearly how the three circles may be drawn so that every cat has a separate enclosure, and cannot approach another cat without crossing a line.
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