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?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

What is common among 11, 69, and 88?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

What's the only room from which no one can enter or leave

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?