Whats the smallest number ("the magic number") that can satisfy these conditions?

- its positive

- it is not divisible by any number below 20 (excluding 1)

- the average of the digits is an even number between 3 and 9

(In reply to Solution by Federico Kereki)

The average of the digits of 37 is 5, which is odd.

Posted by Charlie on 2004-03-17 08:48:49