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Omni-MATH / At a meeting of 12k people, each person exchanges greetings with exactly 3kplus6 others. For any two people, the number who exchange greetings with both is the same. How many pe… · Discussion

Discussing At a meeting of 12k people, each person exchanges greetings with exactly 3kplus{}6 others. For any two people, the number who exchange greetings with both is the same. How many pe… · Omni-MATH

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