WAEC Mathematics 2017 Paper

Concept:A compass bearing is measured from North or South towards East or West using an acute angle less than $90^\circ$.Explanation:The bearing given is $320^\circ$, measured clockwise from North.Since $320^\circ$ is between $270^\circ$ and $360^\circ$, it lies in the northwest quadrant.Find the acute angle between this direction and North:$360^\circ - 320^\circ = 40^\circ$.This direction is to the west of North.Therefore, the compass bearing is written as N $40^\circ$ W.This corresponds to option B.Answer:N $40^\circ$ W, i.e. option B.