How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

How can you leave a room with two legs and return with six legs?

Who can jump higher than a Mountain?

Find out the number of circles in the given picture having Illusion

What does this rebus means ?

What Does this text mean:

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John and Jacob are twin brothers. One of them is a liar whereas the other one is a truth-teller.

I called their home number and one of them picked up.
I asked. 'Does John lie?' The person replied with a yes.

Whom did I talk with, John or Jacob?

One of the leprechaun is missing if you see the two pictures attached to this question. Where did he go? When he comes back, do you know where has he been?

John went to a parrot shop in Mexico, and the parrot owner told him that his parrot is so unique that he repeats everything he hears. John got excited and immediately bought the parrot. John went home and spoke many words, but the parrot does not repeat anything.
He went again to the parrot shop and complaint to the shopkeeper, but the shopkeeper never lied. Explain?

The centre of the third figure is empty. What digit should fit inside?