The Setup

There are two drinking glasses, each contains 100 ml of liquid – in the one is oil and in the other is water. Let’s call them O and W.

You take a teaspoon of O and put it into W.

You then stir up whatever’s in W, and then take a teaspoon back to O.

Is there more water in O or more oil in W?

 

If your answer is

More water in O go here

More oil in W go here