Question
What are the missing numbers?
5117, 5157, (a)         , 5237, (b)         , 5317
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?
5117, 5157, (a)         , 5237, (b)         , 5317