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15 questions
18 - 9 =
16 - 9 =
9
8
7
6
18 - 10 =
20 - 4 =
16
24
17
15
14 - 5 =
17 - 8 =
10
16 - 4 =
14 - 6 =
19 - 7 =
20 - 6 =
14
13
12
19 - 10 =
3
11 - 8 =
17 - 10 =
11
13 - 6 =
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