Question
What are the missing digits?
  1. W
  2. X
   2 X 5 5
+    7 W 4
   3 1 1 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. W
  2. X
   2 X 5 5
+    7 W 4
   3 1 1 9