Why Wine Glass Stem is so long?

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

You need to arrange three 7 and mathematical symbols to form number 1?

Count the number of balls in picture below:

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

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

Can you find a number that lies one third of the distance between 1/3 and 2/3?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?

The dirtier I get, the whiter I look. Who am I?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?