Question
What are the missing numbers?
2116, 2156, (a)         , 2236, (b)         , 2316
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?
2116, 2156, (a)         , 2236, (b)         , 2316