A hundred digit number is formed by writing the first few natural numbers in front of each other as follows:

Find the remainders when this number is divided by each of the numbers from 1 to 20.

(In reply to computer solution for all (spoiler) by Charlie)

Your program is beautiful in its straightforward simplicity. The only choice was the 55, which appears to be safe, although I would have used 60 instead.

Posted by Richard on 2006-03-20 15:31:52