QUOTE(river @ Aug 30 2009, 07:31 PM) 
QUOTE(chocolatedog @ Aug 30 2009, 07:29 PM)
I wouldn't go at all by what the starting note or end note is, purely on the accidentals.......
but this doesn't work for natural minors, or modal tunes.
You're quite right, but I don't think there will be any of those in a Grade V (or lower) theory paper.