Number Island
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Hard · 2026-11-13
★★★★
☆
Form groups of adjacent cells (above, below, left, or right) that add up to:
15
14
30
4
9
8
7
4
3
0
3
0
0
8
8
2
0
0
6
3
9
1
0
0
3
4
1
8
1