I saw this on an RISCOS enthusiast website. Using, head, as many different calculators that you have to hand=20 (especially if you have an iPhone or Windows calc) what result do you get=20 from the following sum. 6/2(1+2) Type it in exactly as above. My trusty Casio fx5000f let me down, sort of. Colin -- cdb, on 11/03/2012 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .