Kakuro
Tutorial -- Basic
Last Cell: Only one valid number remains -- 23 = 1 + 6 + 7 + 5 + [4]; 8 = 5 + [3]; 8 = 3 + [5].
4
11
29
13
3
4
4
10
10
15
17
24
4
22
7
3
10
16
30
4
18
17
4
9
8
25
8
16
4
23
12
16