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There were 16 teams in a volleyball league. Each team played exactly one game against each other team. For each game, the winning team got 1 point and the losing team got 0 points. There were no draws. After all games, the team scores form a sequence in w...

In the magic square, each row, column and diagonal have the same sum. A magic square with an order of 5 is shown below. Notice that the number that is located in the center of the square is 13. Middle values exist only for the case where n is an odd numbe...