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

Can you find out which number multiplied by itself will give the output as 12345678987654321?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

Consider this about a word: The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

There is a straight highway. Four different villages lie on that highway. The distance between them is different. The third village is 60km away from the first village; the fourth is 40 km away from the second; the third is 10 km near to the fourth that it is to the second.

Can you calculate the distance between the fourth and the first village ?