Toughest IIM's Riddle

Toughest  IIM'S Riddle   - 6 November

There is a shop that reads:
Buy 1 for $1.00
10 for $2.00
100 for $3.00
I needed 913 and still only paid $3.00. How could this be financially viable for the shop-keeper?

Solution 


They are numbers for houses and it's $1 per digit


Soln By Shaukat Ahmad &
http://dailybrainteaser.blogspot.com/2011/09/cat-exam-riddle.html



This Blogs Is Inspired By Daily Brain Teaser