A girl walks 12 km south from her house, turns left and walks 26 km, again turns left and walks 37 km, then turns right and walks 6 km to reach her office. In which direction is the office of the girl from her house?

The office is North-East of the house.

Going south 12 then turning left goes east 26.

Turning left again goes north 37, then turning right goes east 6.

Net vertical = 37 north - 12 south = 25 north.

Net horizontal = 26 + 6 = 32 east.

Being to the north and east places the office North-East.