Interview Q&A / Aptitude

1. In how many ways can 6 people sit around a round table? In how many of these do two particular friends sit together?

   120 ways in total, since circular arrangements of n people number (n - 1)! = 5! = 120. With two friends together, treat them as one unit: (5 - 1)! x 2 = 24 x 2 = 48 ways.

   IntermediateQuick answer1 min read