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What number fits into the central square?

9 15 5 0

Calvin Lin by Calvin Lin

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Sarath Kannan
Aug 8, 2014

SUM IS 15 IN EACH 3 VERTICAL OR HORIZONTAL BOX

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Calvin Lin Staff
Jun 24, 2014

Congrats! You answered your first question on Brilliant. In the solution discussions, you get to read how other members solved the problem, and interact with them. Good luck with the next problem.

The image shows a magic square, where each row, column and diagonal adds up to 15. Hence, the value in the central square is 5.

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