A toy car has a bar magnet laid hidden inside its body along its length. Using another magnet how will you find out which pole of the magnet is facing the front of the car?

To determine which pole of the magnet is facing the front of the car, use another magnet whose North & South pole is marked. Now bring any pole, say North Pole of the magnet towards the magnet which is facing the front of the car. If they repel, then it is North Pole which is facing the front and if they get attracted, then it’s South Pole which is facing the front of the car.