John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

By what process could you make a 'Tea-Table' into food?

Which is faster, Heat or Cold ? Explain.

Who can jump higher than a Mountain?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

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

There was a strange boy who was born before his father. How can this be possible?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

What kind of tree can you carry in your hand?

A man has a barrel filled with oil that weighs 100 pounds, and then he puts something into it. Now the barrel weighs less than 100 pounds. What did he put in the barrel?