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CEMC Gauss (Grade 7), 1998

Algebra Difficulty 2.0 Junior Find the answer Canada

The diagram shows a magic square in which the sums of the numbers in any row, column or diagonal are equal. The square is arranged as follows: Row 1: $8$ , blank, blank; Row 2: $9$ , blank, $5$ ; Row 3: $4$ , $n$ , blank. What is the value of $n$ ?

(A) $3$ (B) $6$ (C) $7$ (D) $10$ (E) $11$

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