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Well, I have created a simple table with 25 values, inside it, all the data is readable, except for one that is hidden.

Can you guess it?

The table:

The table

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  • $\begingroup$ Yeah, it's great you caught this detail $\endgroup$
    – xKobalt
    Commented Mar 24, 2020 at 13:30
  • 1
    $\begingroup$ Is the two different background colors relevant? $\endgroup$ Commented Mar 24, 2020 at 13:31

1 Answer 1

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The answer is

90

Reason

The slightly shaded squares are the sum of the adjacent(up, down, left, right) white squares. So, the "? is equal to 5+39+16+30 which is 90.

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  • 1
    $\begingroup$ You got it, nice one :) $\endgroup$
    – xKobalt
    Commented Mar 24, 2020 at 19:09

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