If you write out the numbers from 1 to 5000 in American English (e.g., THREE THOUSAND EIGHT HUNDRED SEVENTY-THREE), it turns out that only one of them has a unique number of characters.
Which is it?
Spaces and hyphens count as characters.
(In reply to computer solution
To be more specific,
THREE THOUSAND, has a unique length within the given range.
That length no longer is unique when the range is extended to 7000.
Posted by Dej Mar
on 2016-03-12 01:58:00