An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

What goes up but never comes down?

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

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.

Using eight eights and addition only, can you make 1000?

what's the probability of getting a king or a queen from a pack of 52 cards?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

You need to move three matchsticks to form three squares. Can you do it?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?