Can you write down eight eights so that they add up to one thousand?

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

The more of this there is, the less you see. What is it?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Can you start the fire using two pieces of wood?

What number do you get when you multiply all of the numbers on a telephone's number pad?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?