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14 questions
10+10
20
10
15
5
15+5
6
19+1
19
18
7
12+3
8
4
10-5
3
18-2
16
2
13-3
6+6
12
13
20-12
14+6
21
17
9+2-3
11
9
6-2+6
20-8
20-19
1
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