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10 questions
What number is missing?
____ , 30, 40, 50
10
20
What number is missing?
10, 20, 30, 40, ________
50
41
What number is missing?
46, 47, 48, 49, _____
50
60
What number is missing?
50, 60, _____ , 80, 90
61
70
What number is missing?
55, 56, 57, 58, 59, _____
50
60
What number is missing?
60, 70, _____ , 90
80
71
What number is missing?
___, 36, 37, 38, 39, 40
30
35
What number is missing?
78, 79, ____ , 81, 82
80
18
What number is missing?
58, 59, ____ , 51, 52
16
60
What number is missing?
26, _____ , 28, 29, 30
27
72
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