A person facing north turns $90^\circ$ clockwise, then $180^\circ$, and then $90^\circ$ anticlockwise. Which direction is the person now facing?

हल

1. 01

   Starting from north, a $90^\circ$ clockwise turn faces east.

2. 02

   A $180^\circ$ turn reverses that, so the person now faces west.

3. 03

   From west, a $90^\circ$ anticlockwise turn goes west to south, because anticlockwise runs north, west, south, east.

4. 04

   The person ends up facing south.