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

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

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?

What is common among 11, 69, and 88?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

In a jungle where there are no street lights or any other artificial source of lights, I notice a black snake crossing the road.
How did I get sight of the snake?

Take away the whole and some still remain. What is it?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?