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

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

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

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?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

That attorney is my brother, testified the accountant.

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

Who is lying?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

A kind heart person buy packed food at 3$/packet from United states and sells them at 1$/packet at Africa. After some time he becomes a millionaire.

How come the guy become millionaire ?