Two brothers always tell the truth. A third brother always lies. The three are standing in front of two garage doors. Behind one is your car; behind the other, a donkey. All three know which door hides the car. You may ask one brother one question. What should you ask to learn the location of your car?
—Jeff Marchant, Port Jervis, N.Y. What do you think, readers? The head-spinning answer appears at the end of the column. Send questions to