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

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

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

What number do you get when you multiply all of the numbers on a telephone's number pad?

A girl rode into a tourist spot out of the city on Thursday. She loved the place and decided to stay for a few days. She stayed for four days and then she left for back home on Thursday.

How can this be possible?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.