Number Island
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Hard · 2026-11-14
★★★★
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Form groups of adjacent cells (above, below, left, or right) that add up to:
23
13
9
28
4
4
1
3
9
9
5
6
0
5
2
0
8
0
0
9
3
7
4
0
9
0
5
3
8
5