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Let's party (Posted on 2020-08-14) Difficulty: 3 of 5
When W.G. invited us to his party he rewired the buttons' panel in the elevator and placed next to it a note:
Welcome.
The fun starts here and now. Originally the numbers were in sequence in a way that numbers 1 and 2 were neighbors - horizontally or vertically, 2 and 3 likewise and so on.
Now on 8 of 16 buttons the numbers were erased and then on 4 additional buttons the original numbers were replaced by the wrong ones.

Restore the original layout, press button 15 and join the fun!
Pressing any other button will get you 90 seconds or less of elevator music and a free ride to a wrong floor...

Can you locate the correct button?

 -x--x-11--x-
 -8-16--9--x-
 -6--x--x--4-
 -x--x-14--2-

Credit due to Mr Bob Stanton

No Solution Yet Submitted by Ady TZIDON    
Rating: 5.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts My thoughts, as I aborted my coding.... | Comment 2 of 4 |
Wow. The solution is so simple and elegant, and shows the power of gray cells over computer bits. 
  Posted by Steven Lord on 2020-08-14 17:29:26
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