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10 questions
10 + 20 =
20
30
40
50
50 + 10 =
60
50
70
80
10 + 10 =
10
20
30
40
30 + 20 =
40
60
70
50
40 + 20 =
50
70
60
80
50 + 30 =
80
70
90
100
90 + 10 =
80
90
100
70
20 + 20 =
10
50
30
40
70 + 20 =
80
90
100
70
80 + 0 =
0
10
80
100