This is an example of a completed NumberSums puzzle. The aim is to select the active cells (circled) so
that the horizontal and vertical totals match the clues at the top and to the side of the puzzle.
The first 3 rows in this puzzle are solved by,
3+1+6 = 10
9+1+2+1+8+7+2 = 30
2+4+2+3+1+3 = 15
The first 3 rows in this puzzle are solved by,
9+2+5+3+5 = 24
3+1+4+3 = 11
1+2+2+2+3 = 10
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