Question
What are the missing numbers?
4878, 4918, (a)         , 4998, (b)         , 5078
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?
4878, 4918, (a)         , 4998, (b)         , 5078