> I think he's saying in base 16 you can make a trick to check divisibility by e.g. 15 in the same way you can check divisibility by 9 in base 10. Yeah - I mis

> I think he's saying in base 16 you can make a trick to check divisibility by e.g. 15 in the same way you can check divisibility by 9 in base 10. Yeah - I misunderstood there and thought they meant divisibility by 16 or 256 not in base 16 or 256. Should've had my morning coffee first :D