Kavitha walks 2 km west, turns left and walks 5 km, turns left again and walks 2 km, then turns left once more and walks 1 km. Where is she now compared with her starting point?

Explanation

1. 01

   Left from west is south, left from south is east, left from east is north.

2. 02

   East–west: 2 km west, then 2 km east, so they cancel.

3. 03

   North–south: 5 km south, then 1 km north, leaving 4 km south.

4. 04

   She is 4 km south of the start.