81 x 9 = 801. What must you do to make the this equation true?

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

There is a barrel with no lid and some wine in it. 'This barrel of wine is more than half full,' said Curly. 'No it's not,' says Mo. 'It's less than half full.' Without any measuring implements and without removing any wine from the barrel, how can they easily determine who is correct?

Why is it against the law for a man living in Delhi to be buried in Mumbai?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

The Judge knows that Alamgir was killed by his girlfriend Jasline, but the judge is unsure whether to punish her. Why?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?