Ah thanks. Don't all these questions and mark schemes get tested beforehand? I wonder what the teacher feedback was. Mine would be: -it's tough to get 2 answers absolutely correct and get no marks for this - this actually bothers me more than the other issue -the mark scheme should give some credit (but not full credit) for rounding in the correct direction but giving an answer with some superfluous "trailing zeros" ( I like that term). I'm pedantic and those trailing zeros drive me to distraction. When I see them on my children's work I have to sellotape my lip to stop me saying "why don't they teach you maths properly?!" Unfair of me I know. As I said above, it's a tough thing when something as relatively trivial as this at this stage in maths can make a significant difference in a child's NC level and what is predicted for GCSE etc on Raiseonline etc.