Imagine 100 people are standing in a circle in an order 1 to 100. A sword is given to person No. 1. He uses the sword and kills the next person (i.e. No. 2) and then pass the sword to the next alive person (i.e. No. 3). All people repeats the same until only one person survives. Which number survives at the last?

Indranil MaitiProfile