The Mudcat Café TM
Thread #95230   Message #1851476
Posted By: Nigel Parsons
05-Oct-06 - 06:33 PM
Thread Name: BS: Isn't maths clever?
Subject: RE: BS: Isn't maths clever?
Sorry Fibula:

Works for 3 or 9 every time (any multiple has the total of its digits as a multiple) But only works for six if the digits total a multiple of 6 and the last digit is even