By the 5 actions ，any number’s itself×itself five times would go back itself

● By the 5 action

By the 5 actions ，any number’s itself×itself five times would go back itself （I mean the single-digit）

Any number’s itself×itself ten times would double itself （I mean the  single-digit）

Now I observe the 1 4 9 6 5 6 9 4 1

I got ：

● It is mirror symmetry（one part is Masculine，another part is Feminine）

● 5 and 6 is the “middle number”or at middle position.

● “double nine would go back one”.

●the two sides is” one and four” “ nine and six” .New born number is in the outside, mature number is in the inside. The “nine” and the “six” is Romeo nine ;Juliet six.

●   (one two three four six seven eight nine) when they itself multiplication itself that square root, they single-digit’s situation is only meet one ,six, four ,nine.

 1×1=1  →the single-digit  is one        

2×2=4 →the single-digit  is four

3×3=9→the single-digit  is nine

4×4=16→the single-digit  is six

5×5=25→the single-digit  is five

6×6=36→the single-digit  is six

7×7=49→the single-digit  is nine

8×8=64→the single-digit  is four

9×9=81→the single-digit  is one

It would behavior that because of the 5 actions reason.