Share Neighboring pairs of multiples of 10
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Fill the missing number
10, 20, ......, 40
30
Fill the missing number 30, 40, ........, 60
50
Fill the missing number 20, 30, 40, 50, ....., 70
60
Fill the missing number ......, 20, 30, 40, 50
10
Fill the missing number 50, 60, 70, ....., 90, 100
80
