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

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

When Jack was six years old he hammered a nail into his favourite tree to mark his height. Ten years later at age sixteen, Jack returned to see how much higher the nail was. If the tree grew by five centimetres each year, how much higher would the nail be?

There are forty elephants and they have forty-fore heads. How can this be possible?

Why do you find that most of the buildings are deprived of the 13th floor?

By using 'because' continuously three times, can you make an English statement ?

John is a strange liar.

He lies on six days of the week, but on the seventh day, he always tells the truth.

He made the following statements on three successive days:

Day 1: "I lie on Monday and Tuesday."
Day 2: "Today, it"s Thursday, Saturday, or Sunday."
Day 3: "I lie on Wednesday and Friday."

On which day does John tell the truth?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

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