There are 5 houses in five different colors. In each house lives a person with a different
nationality. These five owners drink a certain drink, smoke a certain brand of cigar, and keep
a certain pet no owners have the same pet, smoke the same brand of cigar or drink the same drink.
The question is --- who owns the fish?
The German is the only one without a pet:
therefore he must be the one who owns the fish.
Did you get it? Congratulations if you are one of the few!