Question
What are the missing digits? 
  1. N
  2. P
  6 N 2 6
-    2 7 P
  6 1 5 1 


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 digits? 
  1. N
  2. P
  6 N 2 6
-    2 7 P
  6 1 5 1