Fastest Way to multiply

If you wan to multiply two digit number ending in 5 then follow this example.

Let us say we want to multiply 
25 * 25

Here we are at first multiply 5*5=25
Then multiply  2*3 (unit digit with one predecessor)=6
Therefore answer is
      25
  X 25
--------------
     625
--------------
You can try it for others also

Another example is :

95
95
-----
9025
-----

Keep watching ............