> Erm, yes. But the calculators we can use dont have a mod button that > I can find :) Oops ... doesn't it work if you do mod each time? Ah well there we go at least I tried ;-). -- Matej Pfajfar St John's College, University of Cambridge, UK GPG Public Keys @ http://matejpfajfar.co.uk/keys WARNING: THIS E-MAIL ACCOUNT WILL BE DELETED ON 15/07/2002. PLEASE USE mp@cantab.net.