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Place the plaques so every row and column sum matches its target. Trains logic, speed and combinatorial thinking.
How to play
Some numbers have fallen out of the matrix — help put them back. The numbers around the matrix guide you: the gold ones show the sum each row, column and diagonal must add up to, and the white ones show the sum reached so far. Drag the plaques from the reserve onto the empty cells; when the white numbers meet the gold ones, the board is complete.