You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

What came first, the chicken or the egg?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

A thief is convicted in Mexico. He gets the death penalty. The judge allows him to say the last sentence to determine how the penalty will be carried out. If the thief lies, he will be hanged, if he speaks the truth he will be beheaded. The thief tells the last sentence and to everybody's surprise some minutes later he is set free because the judge cannot determine his penalty. What did the thief say?

Where do you go to learn how to make ice cream?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

A newspaper is supposed to have 60 pages, but pages 24 and 41 are missing.
Which other pages won't be there?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?