**A**n arithmetic Le Monde mathematical puzzle :

*A number is “noble” if all its digits are different and if it is equal to the average of all numbers created by permuting its digits.* 160 more words

**A**n arithmetic Le Monde mathematical puzzle :

*A number is “noble” if all its digits are different and if it is equal to the average of all numbers created by permuting its digits.* 160 more words