Solution: MATH 200 Lie Groups
Answer: MASS CLAIM

Written by Kenny Young

A good place to start this puzzle is to note that the 9x and 9/ cages on the top row cannot both contain a 9, so one contains a 9 and the other a lie. This means that the other 5 cells on the top row are not lies and also not 9’s. Then the bottom cell of the 25+ cage has to be greater than 9, so it is a lie and the rest of that cell’s row and column are true.

The solved grid is as follows:

3
9x
5
3
6
21+
8
15+
74
25+
21
9/
9
9
9x
1
54x
874
26+
3
19
6
12+
5
40x
2
21+
1694
19
32
10x
587
2
6x
37
2-
98
13+
514
17+
6
12
4
12+
2
8x
3
3-
658
56x
79
13
1
13+
842
6+
1
3
3/
6
15+
1
5-
9
5-
75
7
5x
1
8
15+
519642
1-
3
574
4x
2
3-
1
15+
13
9
6-
36
2/
8
4-
6
54x
91527
16+
8
9
34


To get the answer, list the lies in 1-9 order:

1
13
2
1
3
19
4
19
5
3
6
12
7
1
8
9
9
13


Converting to the alphabet, this gives the answer MASS CLAIM.