Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Count the number of squares in the picture below.

What type of tree can I carry in my hand?

Different lights make me strange by changing me into different sizes. What am I?

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

what's the probability of getting a king or a queen from a pack of 52 cards?

There is something which you can be arrested for attempting but not for successfully completing.

What is the unique property of the following words ?
* Revive
* Banana
* Grammar
* Voodoo
* Assess
* Potato
* Dresser
* Uneven