Question
What are the missing numbers?
8468, (a)          , 8528, 8558, (b)          , 8618
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?
8468, (a)          , 8528, 8558, (b)          , 8618