People put me on the table and cut me but do not eat me. What am I?

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

What breaks yet never falls, and what falls yet never breaks?

Can you find out the remainder when 3^300 is divided by 5?

The cream is heavier than Milk. True or False?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

It is always ahead of me yet I can never see it. What is it?

What has many teeth, but cannot bite?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?