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UKMT Grey Kangaroo, 2023

Algebra Difficulty 2.0 Junior Find the answer United Kingdom

Evita wants to write the numbers 1 to 8 in the boxes of the grid shown, so that the sums of the numbers in the boxes in each row are equal and the sums of the numbers in the boxes in each column are equal. She has already written numbers 3, 4 and 8, as shown. What number should she write in the shaded box?

(A) $1$ (B) $2$ (C) $5$ (D) $6$ (E) $7$

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