Fill empty squares so that the numbers 1 to N (where N is the number of rows or columns in the grid) appear exactly once in each row and column and the numbers in each block produce the result shown in the top-left corner of the block. Play now!
WARNING: Extreme - This video shows a horrible skydiving accident. I did some quick research and found out that there have been quite a few people who survived a parachute not opening. In fact in 2005 CNN reported about a pregnant woman who survived her chute not opening.
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