5
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Can you fill this grid ? (Version 2.0 )

Grid

Text version

714523  
191303  
165088  
213443  
573211  
91?12?
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3
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The missing numbers are

6 and 7.

To find them, observe that

on row $k$, the two digit number in the middle of the row is obtained by adding the two digit numbers to the left and right, adding $4\times(-1)^k$ to their sum and then dividing by 2.

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  • $\begingroup$ You got it! Excellent!!! $\endgroup$ – Ak19 May 5 at 10:06
  • $\begingroup$ (Please use spoilers here to preserve the mystery for other would-be solvers) $\endgroup$ – Rubio May 5 at 23:17

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