Funny Maths: Writing Answer without asking Question

Tell the audience to give any 5 digit number. After taking another four 5 digit number, final answer you can able to tell.

 for example
          23425 ----(Audience)
          -------
          -------
          -------
          -------

 ----------------
          223423
----------------

How it works?
          23425 ----(Audience)
          34567----- (Audience)
          65432------(Speaker)
          46891------ (Audience)
          53108------(Speaker)
-----------------
          223423
----------------
   Its very simple.  Subtract 2 from the first number. Put the subtracted number (i.i. 2) to the extreme left hand side of the answer. Speaker will write the answer by subtracting each digit of audience told number from 9.
(for example-34567, 9-3=6, 9-4=5, 9-5=4, 9-6=3, 9-7=2. 
Amazing right?