Cool!
But how did you figure out the sequence of the houses and the color??
Okay, let me see.
The Norwegian lives in the first house on the left. Assign Norwegian to house 1, get rid of Norwegian from all other houses. The House next to him is Blue, therefore the Englishman who's house is red cannot possibly live there, nor does the Norwegian himself. So The Englishman is somewhere in houses 3-5 and the Norwegian is in the first. The animal in the blue house is a horse, therefore the Spaniard cannot live there, so the Spaniard lives in Houses 3-5 also. At this point you do not know who lives in House 2, but you know that it cannot be the Norwegian, Spaniard or the Englishman. The Italian and the Japenese is a possibility. You know that the Englishman is in the red house, and that the White is to the left of the Green, therefore the arrangement of the last 3 houses is either Red, White, Green... White, Red, Green... or... White, Green, Red. The rule is that the White must be to the left of the Green. Before I got to this point, I did a LOT of elimination and deduction simply cycling through the rules, removing something new each time. So of the 3 configurations above, I took the each of them and tried to put them in my table by elimination again, and the arrangement White, Red, Green resolved for Houses 1,2 and 5, but it left the Spaniard and the Japanese unresolved in houses 4 and 5. So then I tried the one in my table I uploaded; Red, White, Green, and this worked, it resolved the all components.
But please note, I have missed out about 80% of my steps. There is a lot of elimination and thinking in between, but the house, colours, and nationality were arranged in the way I said. Getting house 1 and 2 arranged was easy, getting 3 and 5 arranged correctly required trial and error.
You must've had a perfect score in your SATs !
I tried solving it but then gave up because I couldn't muster the enthusiasm to find a piece of paper and pencil !
That does not mean that I'm stupid !
Maybe I just have an over occupied brain !
No, I'm not that smart. I spent over an hour on it, well over. And I tried and failed first time, tried again, and then again, and then tried to solve it in two separate methods near the end, and finally got it. Draw a table like the one I uploaded, otherwise it's too difficult to keep track and spot where to eliminate elements.