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15 questions
19 - 9 =
18 - 9 =
8
9
10
11
16 - 7 =
17 - 8 =
13
19 - 5 =
12 - 7 =
19
7
6
5
16 - 9 =
18 - 7
12
14 - 8 =
11 - 9 =
2
3
4
1
14 - 4 =
18
13 - 6 =
19 - 6 =
14
13 - 5 =
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