You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

What is the riddle which can be asked all day with a different correct answer each time.

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

What will you call your mother's brother's brother-in-law?

What does this rebus mean?

O
N
C
E
TIME

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

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?