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