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UKMT Junior Mathematical Challenge, 2018

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

The diagram shows a partially completed magic square, in which all rows, all columns and both main diagonals have the same total. What is the value of $x + y$ ?

(A) $10$ (B) $11$ (C) $12$ (D) $13$ (E) $14$

Figure for this problem

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