There are 3 boxes, exactly one of which has a car. You can keep the car if you pick the correct box!

On each box there is a statement, exactly one of which is true.

Box 1: The car is in this box.

Box 2: The car is not in this box.

Box 3: The car is not in box 1.

Which box has the car?

Box 2: The car is not in this box.

Box 3: The car is not in box 1.

Any one of the 1st and 3rd statement has to be be true. That makes statement #2 positively false. Thereby the car is in box #2.