Question
What are the missing numbers?
3947, (a) _____ , 4047, 4097, (b) _____ , 4197
1 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?
3947, (a) _____ , 4047, 4097, (b) _____ , 4197