What is the best name for Gambler Girl Friend?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

A father is locked up in jail. His wife has gone bankrupt. Their male child has to sell his hotel in order to gain some money. Yet their girl child does not care and is quite happy.

How can someone be so rude?

Why do you find that most of the buildings are deprived of the 13th floor?

A mad serial killer kidnaps people and forces them to play the game of 2 pills with them, In this game, there are pills in the table and one of them is normal pill while the other one is deadly poisonous.
The victim will choose one pill and the killer will pick the other pill and both simultaneously will swallow the pill with water.
victim dies every time.

One day the serial killer kidnaps the Joseph and forces him to play the same game with him.

Joseph solves the mystery of the two pills and remains alive.

Explain?

There are three cows, two dogs, and one cat: How many legs do you have?

In a stable, there are men and horses. In all, there are 22 heads and 72 feet. How many men and how many horses are in the stable

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

You can see it everyday, But cannot touch it at will. What is it?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?