Rainer's Mensa Pages

A spoon full is moved from one glass into the other and a spoon full is taken back from the other into the first, so both contain the same amount of fluid. Now some red wine must be in the white wine glass. But since the amount of fluid in both glasses is identical, the same amount of white wine must be in the red wine glass.

So the answer is:

• The amount of white wine in the red wine is identical to the amount of red wine in the white wine.