Problem

2008 Fermat Problem 21

Suppose N = 1 + 11 + 101 + 1001 + 10001 + \ldots + 1\overbrace{000\ldots0000}1. When N is calculated and written as a single integer, the sum of its digits is

\textbf{(A)}\ 58\quad \textbf{(B)}\ 99\quad \textbf{(C)}\ 55\quad \textbf{(D)}\ 50\quad \textbf{(E)}\ 103

If there are no answer choices shown, enter a numerical answer.


Full credit to this problem is given to the CEMC, you may view all Fermat contests here.


Show/Hide Problem Tags

Problem Tags: No tags

Want to contribute problems and receive full credit? Click here to add your problem!
Please report any issues to us in our Discord server
Go to previous contest problem (SHIFT + Left Arrow) Go to next contest problem (SHIFT + Right Arrow)