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?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

You need to remove two matchsticks to make the below equation true. Can you do it ?

A beggar on the street can make one cigarette out of every 6 cigarette butts he finds. After one whole day of searching and checking public ashtrays the beggar finds a total of 72 cigarette butts. How many cigarettes can he make and smoke from the butts he found?

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

A man is shown a portrait painting. He looks closely, then tells, “Brothers and sisters have I none, but that man’s father is my father’s son!” Who is the man in the portrait?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

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

I add 5 to 9 and get 2. The answer is correct, so what am I?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"