| [quote:post_uid0="Papa Shango"]Ok, The Local Council are building a row of 100 houses. these houses will be numbered from 1 to 100. It is one mans job to buy all the numbers for the front doors.. how many number 9s must this man buy?[/quote:post_uid0]
Well, if each house has one single number, it'll be 20. Unless the 9's are the same are the 6's, just the other way. Which means he'll need 40.
However, the way the question is worded could mean that each house will have all numbers from 1 to 100, meaning that they'll need 2000 or 4000, depending on whether the 6's count.
Or I'm totally wrong. |