1
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This is my 3x3 grid:

$$\begin{matrix} 2 & 6 & 8 \\ 3 & 7 & 3 \\ 6 & 4 & x \end{matrix}$$

Here x should be replaced with some number. Based on the solutions it should be x=1. Can anyone explain the logic?

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  • 1
    $\begingroup$ it seems like that this puzzle comes from elsewhere. please provide the source. unattributed work may get downvoted or even closed. happy puzzling ;) $\endgroup$ – Omega Krypton Sep 15 '19 at 7:16
1
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The answer is

1

because

2 6 8
plus
3 7 3
is exactly
6 4 1 (not sure yet)

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