You have hired a worker to clean your garage. The wage is a gold bar (which has 7 parts like a chocolate bar) for a weeks work. However, you don’t want to give the complete bar in the start. You want to pay the person 1 part for each day of his work. So at the end of first day he should have 1 part, at the end of second day 1 part more (a total of 2 parts), third day 1 part more (3 parts total)…at the end of the week all 7 parts. What is the minimum number of pieces that you should break the gold bar in to pay the worker?
Update: As pointed by Ramdas, this question is not very well framed. There are a few assumptions that you need to make. :)