A domino storage box will fit 6 half dominoes across by 6 half dominoes wide.
Put the following dominoes in the box, numbers up, such that the sum of each row and column totals 14.

(0,0) (1,0) (1,1) (2,0) (2,1) (2,2) (3,0) (3,1) (3,2) (4,1) (4,2) (4,4) (5,1) (5,2) (6,0) (6,1) (6,4) (6,5)

Once you see the numbers can't add up to 14 laying them flat, you knew something had to be up.

As for a number not counting when it's covered up, I agree with that; I mentioned the same point regarding  http://perplexus.info/show.php?pid=3651 and pcbouhid disagreed but changed the problem anyway.

Posted by Gamer on 2006-01-01 00:05:28