Question
What are the missing numbers?
7701, 7711, (a)         , 7731, (b)         , 7751
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

What are the missing numbers?
7701, 7711, (a)         , 7731, (b)         , 7751