Specialties number 9

Still in the discussion of the issues feature number 9 ...
Because I feel that the number 9 still has some distinctive and because it's the number 9 will feature other then I also try to find the feature with the other in the google search to find it ..
Finally, I also get it. And this time I will share them to you who read my post ..

Specialties 9-digit number with the other 9, we can also form a tree. As below:

1 x 9 + 2 = 11
12 x 9 + 3 = 111
123 x 9 + 4 = 1111
1234 x 9 + 5 = 11111
12345 x 9 + 6 = 111111
123456 x 9 + 7 = 1111111
1234567 x 9 + 8 = 11111111
12345678 x 9 + 9 = 111111111
123456789 x 9 + 10 = 1111111111

Now in addition there are also multiple twin 9.

As this

99 x 5 = 494
999 x 23 = 22976
9999 x 23 = 229,976
99999 x 23 = 2299976
999999 x 23 = 22999976
9999999 x 23 = 229999976

Now I see the multiplication of the above certainly keistemewaannya not you know ..?
If not, well let me explain again deh ..

Anything multiplied by the number 9 or the 9 twin pengalinya value placed on the front and kurangkan 1 and for the values in the back 9 as an example kurangkan

99999 x 23 = 2299977
So 23 - 1 = 22
Add 999
You figure the last 99 - 23 = 76 + 1 results continue

So deh 2299977
Ok the first discussion of the distinction of number 9 ..
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