I was asked to generalize a puzzle for 'n' values from the previous round. 
The puzzle was 

You have 9 balls, equally big, equally heavy - except for one, which is a little heavier.

How would you identify the heavier ball if you could use a pair of balance scales only twice?

This was asked in previous round for '9' balls, I was asked to do it for 'n' balls using my logics.
Paper & Pen were provided.