Ondrej Janicko

Reverse Fibonacci sequence

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How does 9 + 8 + 7 = 6, which appears in line 16 of your table?

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8 minutes ago, Ondrej Janicko said:

It is suming the digits in numbers.

https://en.wikipedia.org/wiki/Digit_sum

From your link

Quote

In mathematics, the digit sum of a given integer is the sum of all its digits (e.g. the digit sum of 84001 is calculated as 8+4+0+0+1 = 13).

Following the example

9 + 8 + 7 = 24

You need to provide further explanation.

 

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You have to do digit sum till to number less 10.

9 + 8 + 7 = 24  -> 2 +4 = 6

Suming the digits in numbers in table is always repeating till number less 10.

 

Edited by Ondrej Janicko

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Why, you didn't specify that, nor did the example I quoted from the Wiki article ?

 

Be aware, as a new member, you have a total of 5 posts in the first 24 hours.

Edited by studiot

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Well, the Wikipedia article is only for ilustration.

The core principle I described above. It is repeating suming digits till to number less 10. That is all. Simple and clear. Is't it?

 

Edited by Ondrej Janicko

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1 minute ago, Ondrej Janicko said:

Well, the Wikipedia article is only for ilustration.

The core principle I described above. It is repeating suming digits till to number less 10. That is all. Simple and clear. Is't it?

 

 

Yes thank you, it is now simple and clear what you are doing

But Wiki clearly did not do that

Quote

(e.g. the digit sum of 84001 is calculated as 8+4+0+0+1 = 13).

In particular they did not add 1 + 3 = 4

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So you are only interested in the congruency class modulo 9?

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18 hours ago, taeto said:

So you are only interested in the congruency class modulo 9?

I am interested in Fibonacci sequence and it reverse follower. The congruency class modulo 9 is only tool which I used for derivation reverse Fibonacci sequence.

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