Saturday
April 19, 2014

Homework Help: Math (Algebra)

Posted by Arnau on Thursday, May 2, 2013 at 5:48am.

Given a positive integer n, let S(n) denote the digit sum of n. Consider the sequence of numbers given by

n₁ = S(n)
nk = S(nk−1)k≥2

For how many positive integers n ≤ 2013 does the sequence {nk} contain the number 9?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

maths - Given a positive integer n, let S(n) denote the digit sum of n. Consider...
math - You are given a positive integer such that when the integer is divided by...
Math - A smooth partition of the integer n is a set of positive integers a 1 ,a ...
Algebra - Let S(N) denote the digit sum of the integer N. Let M denote the ...
Math - Let S(n) denote the sum of digits of the integer n. Over all positive ...
MATH - Find the only positive integer whose cube is the sum of the cubes of ...
math - Let S(N) denote the digit sum of the integer N. As N ranges over all 3-...
math - Let S(N) denote the digit sum of the integer N. As N ranges over all 3-...
Math - When you add a positive integer and a negative integer, you sometimes get...
Algebra - A positive integer minus a positive integer is always positive. This ...

Search
Members