<P> Now, who drinks water? Who owns the zebra? </P> <P> In the interest of clarity, it must be added that each of the five houses is painted a different color, and their inhabitants are of different national extractions, own different pets, drink different beverages and smoke different brands of American cigarets (sic). One other thing: in statement 6, right means your right . </P> <P> Assuming that one person drinks water and one owns a zebra, then it is possible not only to deduce the answers to the two questions, but to figure out a complete solution of who lives where, in what color house, keeping what pet, drinking what drink, and smoking what brand of cigarettes . By considering the clues a few at a time, it is possible to slowly build inferences that incrementally complete the puzzle's unique correct solution . For example, by clue 10, the Norwegian lives in house #1, and by clue 15, house #2 must be blue . The Norwegian's house therefore cannot be blue, nor can it be red, where the Englishman lives (clue 2), or green or ivory, which are next to each other (clue 6). It must therefore be yellow, which means the Norwegian also smokes Kools (clue 8). </P> <P> Note that clue 10 mentions the "first" house, without specifying whether it is the house on the extreme left or extreme right if standing in front of them . However, selecting either side as the first house does not change the outcome as to who drinks the water and who has the zebra . </P>

Who drinks the water and who owns the zebra