Thanks, I see where you are coming from now Trisher.
It was meant to be a simple calculation, as some posters thought the previous questions were too difficult. I did say, that I was giving posters an easier time.
I thought, as the other numbers in the puzzle were low, that posters would realise that, it wasn't a difficult level.
Also, I usually hint, when BODMAS is involved.
Erroneously, I expected my class to read my mind and know that I wasn't trying to trick.?
However, your solution is perfectly valid. Trisher and Callistemon, for you.?
It does demonstrate, however, that our perceptions of and approach to solving problems, can be very different.
What have I learned from this? Be very precise and allow for all interpretations.?