Junior Division - Problems and Solutions
Solutions by David Crocker, UNSW, Australia.
Problem 1
Find $$S = 1 + 11 + 111 + \cdots + \underbrace{11 \ldots 1}_{\text{$2014$ digits}}.$$
Junior Division - Problems and Solutions
Solutions by David Crocker, UNSW, Australia.
Problem 1
Find $$S = 1 + 11 + 111 + \cdots + \underbrace{11 \ldots 1}_{\text{$2014$ digits}}.$$