Identify the hidden meaning behind this picture?

Replace the question mark in the picture below.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

What always comes into a house through the keyhole?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

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

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?