Internal Summation

First, What is Internal Summation?

Internal Summation is the single digit summation of all the digits of a number. For example take this number, 9797796032. The internal summation of this number is

9+7+9+7+7+9+6+0+3+2 = 59;

5+9 = 14;

1+4 = 5;

So, the Internal Summation of 9797796032 is 5.

Application:

This Internal Summation is used almost everywhere, right ‘calculating’ whom You should marry (Horoscope) to confirming the origin of Your mobile (Digital Computation of Mobile).

Any Easier Way?

Well if you are calculating Internal Summation of a small number, as cited above, it is easy to do directly. But, what if you are in between some complex calculations all involving higher end single digits? There is a simple way, I think I have formulated. Not sure if it is not already followed, as at least I don’t know.

Here it is.

Calculate IS of 99999999999999999994.

Answer: 4.

How: Remove all the ‘9’ first and remove 9 from the sum of all the digits left.

Given Number: 99999999999999999994.

Remove all ‘9’.

Start removing ‘9’ from the sum of rest digits.

The single digit finally got is the IS of the number, that is 4.

Try,

(i) 686868686868684

(ii) 2010939203593

(iii) 24050439298590303048389

Answers?

(i) 3.

(ii) 1.

(iii) 8.

Easy …..???