Looks like only 2 questions are needed, the other just make it cool: the first where you pick the color and the third where you pick the house.
Let's look at the green numbers (9, 25, 23, 16, and 12) and let's say you pick 12. You click green on the first question. In the third quesiton when you pick the house, each of the green number is in a different house. By clicking the house it now matches "green" with "house A": that's 12...
:wink:
PS: hopefully I didn't ruin the fun TOOO much...