Write the number 1000 as an arithmetic expression, i.e. using only digits and the symbols
+ - * /
such that exactly nine 9's and no other digits show up.

999+99/99 uses seven nines.
(9999-999)/9 uses eight nines.
999+999/999 uses nine nines!

Posted by Federico Kereki on 2006-08-21 09:21:07