No one wants to have it, but if one got it, he does not want to lose it. What is It?

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

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

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

What is common among 11, 69, and 88?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

That attorney is my brother, testified the accountant.

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

Who is lying?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?