You have to solve 10 questions by choosing answers
2
-2
8
-8
-15
-7
+7
13
8
-13
9
-15
-9
15
10
-12
8
+12
-8
4
15
10
2
-2
-15
6
-9
+24
-24
+9
8
-6
-8
6
11
-3
3
5
-5
0
Yes
No
>
=
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