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Consider M with r = 513 1025 . Let k be the number of all those circles C n that are inside M. Let l be the maximum possible number of circles among these k circles such that no two circles intersect. Then

k + 2 l = 22
2k + l = 26
2k + 3 l = 34
3k + 2 l = 40

Correct answer: 3k + 2 l = 40

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