Question
Prove that if a and b are integers, with b > 0, then there exist unique integers q and r
satisfying a= qb + r, where 2b ::S r < 3b.
A room has 6 doors.In many ways can a man enter the room through one door and come out through a different door ?
Prove that the sum of the interior angles of any convex polygon having n sides is (2n-4)right angles
