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CEMC Gauss (Grade 8), 1998

Combinatorics Difficulty 2.0 Junior Find the answer Canada

In the $4\times4$ square shown, each row, column and diagonal should contain each of the numbers $1, 2, 3$ , and $4$ . Find the value of $K+N$ .

(A) $4$ (B) $3$ (C) $5$ (D) $6$ (E) $7$

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