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?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

Can you write down eight eights so that they add up to one thousand?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I am the fastest animal but cannot climb the tree. What am I?

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

How could a baby fall out of a twenty-story building onto the ground and live?

What type of tree can I carry in my hand?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?