Question
What are the missing digits?
  1. N
  2. P
   6 P 7 4
+    6 N 5
   7 5 3 9

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 P 7 4
+    6 N 5
   7 5 3 9