If you say my name, I will no longer exist. What am I?

Why do we preferably have round manhole covers and not square ones?

A father's child, a mother's child, yet no one's son.

Who am I?

If eleven plus two equals one, what does nine plus five equal?

Identify the hidden meaning behind this picture?

Peter wakes up daily to pick up his cycle and crosses the border between Spain and France daily with a bag on his shoulder. He is investigated daily by the officials but they don't find anything suspicious.

If we tell you that he is smuggling something what would it be?

What work can one never finish?

Out of three Friends John, Jacob and Jonny one of them is a king, one is a bureaucrat, and one is a Spy.

The king always tells the truth, the bureaucrat always lies, and the Spy can either lie or tell the truth.

John says: Jonny is a bureaucrat
Jacob says: John is a king
Jonny says: I am a Spy

Tell me, Who is the king, who is the bureaucrat, and who is the Spy?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?