let-d-n-denote-the-sum-of-the-digits-of-n-i-e-d-1000-1-d-999-27-find-minimum-k-such-that-d-d-k-times-d-5-10-100-10-

Question Number 153657 by talminator2856791 last updated on 09/Sep/21

let d (n) denote the sum of the digits

of n .

i . e d (1000) = 1, d (999) = 27

find minimum k such that

Extra \left or missing \right

Commented by Rasheed.Sindhi last updated on 09/Sep/21

k = 3

Commented by talminator2856791 last updated on 09/Sep/21

wheres the proof ?