On Sat, 26 Mar 2005 05:18:43 +0900, Ruby Quiz <james / grayproductions.net> wrote:
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> 
> 1.  Please do not post any solutions or spoiler discussion for this quiz until
> 48 hours have passed from the time on this message.
> 
> 2.  Support Ruby Quiz by submitting ideas as often as you can:
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> 3.  Enjoy!
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> 
> by Timothy Byrd
> 
> While we normally write numbers using Arabic (or since Quiz #22, Roman)
> numerals, numbers can also be written out as English phrases.
> 
> For example:
> 
>         7    == seven (the hard way)
>         42   == forty-two (a very important number)
>         2001 == two thousand and one (a space odyssey)
>         1999 == (party like it's) nineteen hundred and ninety-nine
> 
> So the quiz is a problem from a Pi Mu Epsilon (US national math club)
> newsletter:
> 
> "When the integers 1 to 10_000_000_000 are written in the English language, then
> sorted as strings, which odd number appears first in the list?"
> 
> Your mission, should you choose to accept it, is to:
> 
> - Create Ruby code to translate a number to it's English language form. (My
> sample version works with integers up to 10**72-1.)
> 
> - Determine programmatically which odd number in 1..10_000_000_000 would sort
> first if written in English. (Brute force is the obvious solution, but the
> computer may have to think about it...)
> 
> - Would the answer change for a larger range of values, say 10**30?
> 
> - Do French and German Rubyists get a different answer than the Americans?
> 
> Extra credit:
> 
> -Add a Pinyin translator: http://www.mandarintools.com/numbers.html
> 
> 

Ok sounds interesting, is the rule, less than 2000 

1000 -> ten hundred
1800 -> eighteen hundred
2000 -> two thousand

Also what are the rules for the "and"?

1050050 -> one million fifty thousand and fifty
or
1050050 -> one million and fifty thousand and fifty

Also we hyphenate when 20 < x > 100 (and not a multple of 10)?