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10 questions
1+1=?
2
1
3
4
2+2=?
4
2
3
1
3+3
6
5
3
4
4+4=?
8
6
5
7
5+5=?
10
11
9
8
6+6=?
12
11
10
13
7+7=?
12
13
11
14
8+8=?
14
15
13
16
9+9=?
18
17
15
16
10+10=?
20
21
24
22
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