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Complete the magic square given below, so that the sum of the numbers in each row or in each column or along each diagonal is 15.

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Best answer

Solving for diagonal, 

6 + 5 + x = 15 

∴ x = 4

Solving for first row,

6 + 1 + x = 15

∴ x = 8

Solving for last column,

8 + x + 4 = 15

∴ x = 3

Solving for second row,

x + 5 + 3 = 15

∴ x = 7

Solving for first column, 

6 + 7 + x = 15 

∴ x = 2

Solving second column, 

1 + 5 + x = 15 

∴ x = 9

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