Let's continue working on colors. The third house can be either
green, red or white (yellow and blue are
already assigned to the first and the second house).
The third house can't be green, since:
5.
The
green
house owner drinks
coffee.
and we know already that the owner of the third house drinks milk,
not coffee.
The third house can't be white either, since:
4.
The
green
house is on the
left
of the
white
house (next to it).
and we know already that the blue is left of the third
house, not the green one.
Hence, the only color, which is left for the third house, is red.
Once the color of the third house is defined, the nationality of
its owner becomes obvious:
1.
The
Brit
lives in a
red
house.
The remaining two colors are easy to assign:
4.
The
green
house is on the
left
of the
white
house (next to it).
Only two adjacent houses and two colors are left and thus, the fourth
house is green and the second house is white.
Once the color of the fourth house is determined, the beverage choice
of its owner becomes obvious:
5.
The
green
house owner drinks
coffee.
No
1
2
3
4
5
Col
yellow
blue
red
green
white
Nat
Norw
Brit
Bev
milk
coffee
Cig
Dunh
Pet
horse
As a possible next step can you figure out what are the nationalities of
the second, fourth and fifth house owners?