MODULE IN MATHEMATICS 6 Quarter 2 / Week 5/ Day 1

{. . . . , -5, -4, - 3, -2, -1, 0, 1, 2, 3, 4, 5, . . . .} 

A messenger forgot on what floor in a building he would deliver his package. With no one to ask for directions, he rode the elevator up to the 10th floor. Then, he went down 5 floors and went up again 4 floors. Still, he could not find the right floor. So, he went up again 6 floors, then down again 3 floors and decided to stop for a while. On what floor did the messenger stop?