How to Square numbers made up of 1

Here is a cool trick to square numbers made up of repeating 1 (one).

    Count the number of repeating 1 in the number to be squared and put the digits ascending from 1 up to that number. That is, if there are four 1's in the number to be squared, put 1234.
    Then, put down the same numbers inversely, that is, 321.

That’s it. It is so easy, it’s just mental math. Easy and fast.

Let’s illustrate with an Example: http://mathema-tricks.blogspot.com/