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?

I have teeth but i don't bite. Who Am I ?

There was a strange boy who was born before his father. How can this be possible?

Count the number of balls in picture below:

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

What has lots of eyes, but can’t see?

There is a place where if I stand up straight, I will still be considered sideways.

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?