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