When my father was 31 I was 8. Now he is twice as old as me. How old am I?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What number divided by 4 is the same as that number minus 4?

Can you name some countries which do not have the alphabet 'A' in them?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

I am sure no one can have two things for dinner. what are they?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Why do you find that most of the buildings are deprived of the 13th floor?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

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?