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

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

In the picture given below, can you find out which digit will take place of the question mark?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Katniss and Peeta are liars. They both lie on some specific days.

Katniss lies on Fridays, Saturdays and Sundays. She speaks the truth on all other days.

Peeta lies on Tuesdays, Wednesdays and Thursdays. He speaks the truth on all other days.

Can you tell that one day of the week when both of them will say "Tomorrow, I will lie."?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

What makes this number unique: 8,549,176,320?